The first statement is true, as the Tolivers are not eligible for a child credit regardless of the number of their children. However, the second statement is false, as the earned income credit is available to low-income taxpayers with dependent children.
The earned income credit helps to offset the burden of the federal payroll tax on low-income families and encourages individuals to seek employment rather than depend on welfare. Finally, the information about Mrs. Starling's employment does not provide enough information to determine any tax-related implications.
The statement regarding Mr. and Mrs. Toliver not being eligible for a child credit is true. Their Adjusted Gross Income (AGI) is $339,000, which is above the income threshold for eligibility for the child tax credit. The credit phases out for joint filers with AGI over $400,000, and they are not eligible due to their high income.
Regarding the Caseys, the earned income credit (EIC) is only available to low-income taxpayers with dependent children. The EIC helps offset the burden of federal payroll taxes on low-income families and encourages individuals to seek employment instead of relying on welfare. In the case of the Caseys, since Mrs. Casey is employed full-time as an attorney and Mr. Casey is an unpublished novelist with no income, they might not qualify for the EIC as they might not be considered low-income, depending on Mrs. Casey's salary.
Mrs. Starling worked for Abbot Inc. and earned $122,000 during her time there. She later worked for JJT Inc., and her salary from both companies should be combined to determine her total income for the year. Based on the given information, Mrs. Starling's total income can be used to determine her tax liabilities and eligibility for tax credits or deductions.
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Heights of men in America have a normal distribution with a mean of 69.5 9nches and a standard deviation of 3 inches. Perform the following calculations.. Let X represent the mean height of a random sample of n American adult men. Find n if P(68.52 < X <70.48) = .95.? If 100 American men are chosen at random, find the probability that at least 25 of them are shorter than 68 inches. Hint, let Y be the number of Americans shorter than 68, then Y is binomial. Find the probability using a normal approximation?
The probability between these two z-scores to be 0.95. In other words P(z₁ < Z < z₂) = 0.95
What is probability?
Probability is a branch of mathematics that deals with the study of random events or phenomena. It is the measure of the likelihood that an event will occur or not occur, expressed as a number between 0 and 1, where 0 represents impossibility and 1 represents certainty.
To find the value of n in the first calculation, we need to determine the sample size that results in a probability of 0.95 for the interval (68.52 < X < 70.48).
For a normal distribution, we can calculate the z-scores corresponding to the given values of X using the formula:
z = (X - μ) / (σ / √n)
where μ is the population mean, σ is the population standard deviation, and n is the sample size.
Given:
μ = 69.5 inches
σ = 3 inches
For the lower bound, X = 68.52 inches:
z₁ = (68.52 - 69.5) / (3 / √n)
For the upper bound, X = 70.48 inches:
z₂ = (70.48 - 69.5) / (3 / √n)
We want the probability between these two z-scores to be 0.95. In other words:
P(z₁ < Z < z₂) = 0.95
We can convert this probability to the standard normal distribution using the z-table or calculator. The z-table gives the area to the left of the z-score, so we can calculate:
P(Z < z₂) - P(Z < z₁) = 0.95
Now, we can look up the z-scores in the standard normal distribution table and find their corresponding probabilities. Let's assume the values to be Z₁ and Z₂.
P(Z < Z₂) - P(Z < Z₁) = 0.95
Now, substitute the values of Z₁ and Z₂ using the calculated z-scores:
P(Z < z₂) - P(Z < z₁) = 0.95
By solving this equation, we can determine the value of n.
For the second calculation, we need to find the probability that at least 25 out of 100 randomly chosen American men are shorter than 68 inches. We can approximate this probability using the normal approximation to the binomial distribution.
Let Y be the number of Americans shorter than 68 inches among the 100 randomly chosen men. The probability of Y can be approximated using the normal distribution with mean (np) and standard deviation (sqrt(np(1-p))), where n is the sample size and p is the probability of success in a single trial.
In this case, n = 100 and p is the probability that a randomly chosen American man is shorter than 68 inches. To calculate p, we need to find the area to the left of 68 inches in the normal distribution with mean 69.5 inches and standard deviation 3 inches.
Once we have the values of np and (np(1-p)), we can use the normal distribution to find the probability that at least 25 men are shorter than 68 inches by calculating:
P(Y >= 25) = 1 - P(Y < 25)
We can use the calculated mean and standard deviation to approximate this probability using the normal distribution.
Hence, the probability between these two z-scores to be 0.95. In other words P(z₁ < Z < z₂) = 0.95
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calculate the relative abundance of the (m 2) peak to the m peak for c10h6br2, where m corresponds to 12c101h679br2 and m 2 corresponds to 12c101h679br81br.
The relative abundance of the (M+2) peak to the M peak for C10H6Br2 is approximately 0.0266%.
To calculate the relative abundance of the (M+2) peak to the M peak for C10H6Br2, we need to consider the natural abundance of carbon and bromine isotopes.
The formula for C10H6Br2 suggests that we have a total of 10 carbon atoms, 6 hydrogen atoms, and 2 bromine atoms. We'll consider the isotopic composition for carbon and bromine.
For carbon isotopes, the natural abundance of 12C is approximately 98.93%, and the natural abundance of 13C is approximately 1.07%.
For bromine isotopes, the natural abundance of 79Br is approximately 50.69%, and the natural abundance of 81Br is approximately 49.31%.
To calculate the relative abundance of the (M+2) peak to the M peak, we need to consider the isotopic contributions of each atom.
For carbon, we have 10 carbon atoms, so the probability of having a (M+2) peak due to one carbon atom is (1.07%)(98.93%)^9(1.07%) = 0.00106432.
For bromine, we have 2 bromine atoms, so the probability of having a (M+2) peak due to one bromine atom is (49.31%)(50.69%) = 0.25006439.
The overall relative abundance of the (M+2) peak to the M peak is the product of the individual probabilities:
Relative abundance = (0.00106432)(0.25006439) ≈ 0.0002662 or approximately 0.0266%.
Therefore, the relative abundance of the (M+2) peak to the M peak for C10H6Br2 is approximately 0.0266%.
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Identify the explanatory variable and the response variable. A farmer wants to determine if the temperature received by similar crops can be used to predict the harvest of the crop. The explanatory variable is the ▼ (harvest of the crop, farmer, temperature) .The response variable is the ▼ (farmer ,harvest of the crop ,temperature)
The explanatory variable is temperature, as the farmer wants to use it to predict the harvest of similar crops.
The response variable is the harvest of the crop, as this is the variable that is being predicted by the temperature. In this scenario, the explanatory variable is the temperature, as it is being used to predict the outcome. The response variable is the harvest of the crop, as it is the outcome that the farmer wants to understand based on the explanatory variable. Your answer: The explanatory variable is the temperature. The response variable is the harvest of the crop.
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given are five observations for two variables, and . use table 2 of appendix b.
It is essential to note that variables play a crucial role in statistical analysis and that understanding them is key to interpreting results correctly. Table 2 in appendix B likely provides information on statistical tests and their corresponding critical values for various variables and can be a helpful resource in performing statistical analysis.
To answer this question, I will need more information about the two variables given in the observation. Table 2 in appendix B likely provides information on statistical tests and their corresponding critical values for various degrees of freedom, significance levels, and other variables. Without knowing the specific details of the data and the test being performed, it is difficult to provide a definitive answer.
However, it is important to note that variables play a critical role in statistical analysis. Variables are characteristics or attributes that can vary between individuals or groups in a dataset. They are often used to measure or describe certain phenomena or behaviors and can be continuous, categorical, or ordinal. Understanding the variables involved in a statistical analysis is essential for interpreting the results correctly.
In conclusion, I would need additional information about the variables and the statistical test being performed. However, it is essential to note that variables play a crucial role in statistical analysis and that understanding them is key to interpreting results correctly. Table 2 in appendix B likely provides information on statistical tests and their corresponding critical values for various variables and can be a helpful resource in performing statistical analysis.
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The equation x^3-6x=72 has a solution between 4 and 5
Use a trial and improvement method to find this solution. Give your answer correct to 1 decimal place. You must show ALL your working out.
Answer:
x≈4.63902101
Step-by-step explanation:
find all values of x for which the function is continuous. (enter your answer in interval notation.) g(x) = √x / x³ - 5x² - 14x
x > 7
The function g(x) = √x / (x³ - 5x² - 14x) is continuous for all values of x greater than 7, which can be represented in interval notation as (7, ∞).
To determine the values of x for which the function g(x) is continuous, we need to consider any potential points of discontinuity. In this case, the function is a rational function, so we need to identify any values of x that would make the denominator equal to zero, as division by zero is undefined.
The denominator of g(x) is x³ - 5x² - 14x. To find the values of x that make the denominator zero, we can factor it as x(x² - 5x - 14) = 0. Solving this equation, we find that x = 0 and x = 7 are the values that make the denominator zero.
However, since the question specifies that x > 7, the interval of interest is x > 7. In this interval, the denominator of the function is always positive, ensuring that there are no points of discontinuity. Therefore, the function g(x) is continuous for all values of x greater than 7, which can be represented as (7, ∞) in interval notation.
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Please help will mark branliest!
Answer:
0.7 is the probability they would allow it
Step-by-step explanation:
0.3 is the probability out of 1
so 1-0.3 is the probability they would allow it
1-0.3=0.7
Find the given limit lim(x,y) (x2−1)(y2−4)/(x−1)(y−2)(x,y)→ (1,2)
The limit of the expression as (x, y) approaches (1, 2) is 8.
To find the limit of the given expression as (x, y) approaches (1, 2), we can use algebraic manipulation and factorization.
First, let's simplify the expression:
[tex](x^2 - 1)(y^2 - 4) / ((x - 1)(y - 2))[/tex]
Next, we can factorize the numerator and denominator:
[tex](x^2 - 1) = (x - 1)(x + 1)\\(y^2 - 4) = (y - 2)(y + 2)[/tex]
Substituting these factorizations into the expression, we have:
((x - 1)(x + 1)(y - 2)(y + 2)) / ((x - 1)(y - 2))
Now, we can cancel out the common factors of (x - 1) and (y - 2):
(x + 1)(y + 2)
At this point, we can directly substitute the values x = 1 and y = 2 into the expression:
(1 + 1)(2 + 2)
= 2 × 4
= 8
Therefore, the limit of the expression as (x, y) approaches (1, 2) is 8.
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The line that is normal (perpendicular) to the surface 3x 2 − y 2 − 2z 2 = 3 at the point (3, 4, 2) intersects the yz-plane. What is the z-coordinate of this point of intersection? A) −2 B) 0 C) 2 D) 10 3
The z-coordinate of this point of intersection is 10/3.
As given,
The line that is normal (perpendicular) to the surface 3x² − y² − 2z² = 3 at the point (3, 4, 2) intersects the yz-plane.
Suppose that,
f = 3x² − y² − 2z² - 3
Differentiate function,
fx = 6x
fy = -2y
fz = -4z
So, (fx, fy, fz) = (6x, -2y, -4z)
At the point (3, 4, 2) such as (x = 3, y = 4, and z = 2)
(f₃, f₄, f₂) = (18, -8, -8)
So, vector r = (3, 4, 2) + λ (18, -8, -8)
At yz plane (x = 0)
So, 3 + 18λ = 0
Solve the value for λ respectively,
3 + 18λ = 0
18λ = -3
λ = -1/6
So, z = 2 - 8 λ
Substitute value of λ respectively,
z = 2 - 8 (-1/6)
z = 2 + 8/6
z = 2 + 4/3
z = 10/3
Hence, the option D is correct.
Hence, the z-coordinate of this point of intersection is 10/3.
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show that the following method si convergent and determine its global order of accuracy
yn+2 - yn = h (-γfn+2 + 2(1+γ)fn+1 - γfn)
The given method is convergent with a global order of accuracy 2. It involves the computation of the next value in the sequence using a combination of the current and previous values.
The given method is a linear multistep method for solving ordinary differential equations of the form yn+2 - yn = h (-γfn+2 + 2(1+γ)fn+1 - γfn), where yn represents the approximate solution at time tn, h is the step size, and γ is a parameter.
To determine the convergence and global order of accuracy, we need to analyze how the method approximates the exact solution of the differential equation. By substituting the exact solution into the method's formula, we can examine the error term.
Upon analysis, it can be shown that the method is convergent, meaning that as the step size approaches zero, the numerical solution approaches the exact solution. Furthermore, the method has a global order of accuracy 2. This implies that the error between the numerical and exact solutions is proportional to the square of the step size. In other words, if we halve the step size, the error will be reduced by a factor of four.
The convergence and order of accuracy are crucial indicators of the method's reliability and efficiency. Convergence ensures that the numerical solution is approaching the correct solution, while a higher order of accuracy indicates that the method provides more accurate results with smaller step sizes.
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It is not possible to determine the global order of accuracy based solely on the given method
To analyze the convergence and determine the global order of accuracy of the given method, we will perform a local truncation error analysis.
Let's assume that the exact solution at time tn is given by [tex]y(tn)[/tex], and the numerical solution at tn is denoted by yn. We can expand the terms in the given method using Taylor series expansions around tn:
[tex]yn+2 = y(tn+2) = y(tn) + y'(tn)h + \frac{y''(tn)h^2}{2!} + O(h^3)\\yn+1 = y(tn+1) = y(tn) + y'(tn)h + \frac{y''(tn)h^2}{2!} + O(h^3)\\yn = y(tn)[/tex]
Now, substitute these expansions into the given method:
[tex]yn+2 - yn = h (-γfn+2 + 2(1+γ)fn+1 - γfn)[/tex]
[tex](y(tn) + y'(tn)h + \frac{y''(tn)h^2}{2!} + O(h^3)) - y(tn) = h (-γ(y(tn+2) + O(h^3)) + 2(1+γ)(y(tn+1) + O(h^3)) - γy(tn) + O(h^3))[/tex]
Simplifying and rearranging the terms, we get:
[tex]y'(tn)h + \frac{y''(tn)h^2}{2!} = h (-γy(tn+2) + 2(1+γ)y(tn+1) - γy(tn)) + O(h^3)[/tex]
Dividing both sides by h and neglecting higher-order terms, we obtain:
[tex]y'(tn) + \frac{y''(tn)h}{2!} = -γy(tn+2) + 2(1+γ)y(tn+1) - γy(tn)[/tex]
Now, compare this equation with the Taylor series expansion of the exact solution y(tn) and its derivatives:
[tex]y'(tn) + \frac{y''(tn)h}{2!} = y'(tn) + y''(tn)\frac{h}{2!} + O(h^2)[/tex]
By comparing the corresponding terms, we can see that the local truncation error is O([tex]h^2)[/tex].
Since the local truncation error is O[tex](h^2)[/tex], the method is consistent of order 2. To determine the global order of accuracy, we need to investigate whether the method is also stable and convergent. Without further information or analysis, it is not possible to determine the global order of accuracy based solely on the given method. Additional information, such as stability analysis or convergence proofs, would be needed to establish the global order of accuracy.
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determine whether the following series converges or diverges. ∑n=1[infinity](−1)nsin(9n)
Based on the behavior of the terms, the series ∑n=1∞ (−1)nsin(9n) diverges.
To determine whether the series ∑n=1∞ (−1)nsin(9n) converges or diverges, we can analyze its behavior.
The series involves alternating signs with the term (−1)n and the function sin(9n).
For a series to converge, it must satisfy two conditions:
1. The individual terms of the series must approach zero as n approaches infinity.
2. The series must exhibit an overall pattern or behavior that allows the sum to converge.
Let's analyze the behavior of the terms in the series:
As n increases, the term (−1)n alternates between positive and negative values. The function sin(9n) oscillates between -1 and 1 as n increases.
Since sin(9n) oscillates indefinitely between -1 and 1 without approaching zero, the terms of the series do not converge to zero as n approaches infinity.
Therefore, based on the behavior of the terms, the series ∑n=1∞ (−1)nsin(9n) diverges.
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use the series to approximat the definite integral to within the indicated accuracy tan^-1(x)
The series expansion of [tex]tan^{(-1)}(x)[/tex] can be used to approximate the definite integral of the function over a given interval.
∫[tex][a, b] tan^{(-1)}(x) dx[/tex]=∫[tex]= [a, b] (x - (x^3)/3 + (x^5)/5 - (x^7)/7 + ...)[/tex]
To approximate the definite integral of tan^(-1)(x) using a series, we can use the Taylor series expansion of the arctangent function. The Taylor series expansion of tan^(-1)(x) is given by:
[tex]tan^{(-1)}(x) = x - (x^3)/3 + (x^5)/5 - (x^7)/7 + ...[/tex]
The accuracy of the approximation depends on the number of terms used in the series. The more terms included, the more accurate the approximation will be.
Let's say we want to approximate the definite integral of tan^(-1)(x) over the interval [a, b]. We can rewrite the integral as the limit of a series:
To approximate the integral, we can truncate the series after a certain number of terms and integrate each term individually over the interval [a, b]. Then, we sum up the results of each term to get the approximate value of the integral.
The accuracy of the approximation can be improved by including more terms in the series or by decreasing the interval [a, b] to a smaller subinterval.
It's important to note that the accuracy of the approximation depends on the choice of interval [a, b] and the number of terms used in the series. The more terms included and the smaller the interval, the more accurate the approximation will be.
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Find the monthly house payments necessary to amortize 7.2% loan of 256.400 $ over 30 years.The payment size is $Round to the nearest cent
To amortize a loan of $256,400 with an interest rate of 7.2% over 30 years, the monthly house payment can be calculated using the amortization formula. The payment size is $1,758.70 (rounded to the nearest cent).
To find the monthly house payment necessary to amortize the loan, we can use the formula for calculating the monthly payment amount for an amortizing loan. The formula is given by:
Payment = (Loan Amount * Monthly Interest Rate) / (1 - (1 + Monthly Interest Rate)^(-Number of Payments))
First, we need to convert the annual interest rate to a monthly interest rate. The monthly interest rate can be calculated by dividing the annual interest rate by 12 and converting it to a decimal. In this case, the monthly interest rate is 7.2% / 12 = 0.006.
Next, we substitute the values into the formula. The loan amount is $256,400, the monthly interest rate is 0.006, and the number of payments is 30 years * 12 months = 360 months.
Plugging in these values into the formula, we have:
Payment = (256,400 * 0.006) / (1 - (1 + 0.006)^(-360))
Calculating this expression, we find that the monthly house payment necessary to amortize the loan is approximately $1,758.70 when rounded to the nearest cent.
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Show how to derive the relativist mass formula: m=m0√1−v2c2 .
The relativistic mass formula, m = m₀√(1 - v²/c²), can be derived from the principles of special relativity. The formula relates the relativistic mass (m) of an object to its rest mass (m₀), velocity (v), and the speed of light (c).
What is relativistic mass?
Relativistic mass is a concept in physics that refers to the mass of an object as observed from a moving frame of reference, taking into account relativistic effects. It is a term associated with Einstein's theory of relativity and is dependent on the velocity of the object.
To derive the formula, we start with the concept of relativistic energy, which is given by E = mc², where E is the total energy of the object. In special relativity, energy and mass are interconnected.
Next, we consider the relativistic kinetic energy, which is given by K = (γ - 1)m₀c², where γ is the Lorentz factor and is defined as γ = 1/√(1 - v²/c²). The Lorentz factor takes into account the time dilation and length contraction effects at high velocities.
We equate the relativistic energy (E) to the sum of rest energy (m₀c²) and relativistic kinetic energy (K), yielding E = m₀c² + (γ - 1)m₀c².
Simplifying the equation, we have E = γm₀c².
Since E = mc², we can equate the two expressions and obtain mc² = γm₀c².
Dividing both sides by c², we get m = γm₀.
Substituting the value of γ, we have m = m₀/√(1 - v²/c²).
This is the relativistic mass formula, which shows how the mass of an object changes with velocity, taking into account the effects of special relativity.
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bir kare ve dört eşkenar üçgenden meydana gelen şeklin çevre uzunluğu 72 cm olduğuna göre karenin çevre uzunluğunu hesaplayınız
Answer:
writing in english is easier
Step-by-step explanation:
in the diagram below chords ab and cd intersect at e if mAEC =4x mAC=120 and mDB = 2x what is the value of x
Answer:
x = 20--------------------------
According to the Angles of Intersecting Chords Theorem, the angle between two chords is half the sum of the intercepted arc measures :
m∠AEC = m∠DEB = (mAC + mDB)/2Substitute and solve for x:
4x = (120 + 2x)/24x = 60 + x3x = 60x = 20solve the initial value problem dx/dt = ax with x(0) = x0. a = | 0 1 | |−6 −5| x0 = |−1| |−2|
The solution to the initial value problem dx/dt = ax, with [tex]x(0) = x_{0}[/tex] and [tex]a = \left[\begin{array}{ccc}0&1\\-6&-5\end{array}\right][/tex], where [tex]x_0 =\left[\begin{array}{ccc}-1\\-2\end{array}\right][/tex], is [tex]x(t) =\left[\begin{array}{ccc}-t - 2e^(-5t) + e^(-6t)\\-2t - e^(-5t) + e^(-6t)\end{array}\right][/tex].
To solve the initial value problem dx/dt = ax, where a is the given matrix [tex]\left[\begin{array}{ccc}0&1\\-6&-5\end{array}\right][/tex], and [tex]x(0) = x_{0} \\[/tex] is the initial condition, we can use the matrix exponential method.
First, we need to find the matrix exponential of the matrix a. The matrix exponential of a is given by the formula:
[tex]e^{at} = I + at + (at)^2/2! + (at)^3/3! + ...[/tex]
Using the given matrix a, we can calculate its powers:
[tex]a^2 = \left[\begin{array}{ccc}-6&-5\\36&31\end{array}\right][/tex]
[tex]a^3 = \left[\begin{array}{ccc}36&31\\-216&-185\end{array}\right][/tex]
Now, we substitute these values into the matrix exponential formula:
[tex]e^{at} = I + at + (at)^2/2! + (at)^3/3! + ...[/tex]
[tex]e^{at} =\left[\begin{array}{ccc}1&0\\0&1\end{array}\right] + \left[\begin{array}{ccc}0&t\\-6t&-5t\end{array}\right] + \left[\begin{array}{ccc}-6t&-5t\\36t&31t\end{array}\right]/2! + \left[\begin{array}{ccc}36t&31t\\-216t&-185t\end{array}\right] /3! + ...[/tex]
Simplifying the above expression, we get:
[tex]e^{at} =\left[\begin{array}{ccc}1&t\\-6t&1-5t+t^2/2\end{array}\right] + ...[/tex]
Now, to find the solution x(t), we multiply the matrix exponential e^(at) with the initial condition [tex]x_{0}[/tex]:
[tex]x(t) = e^{at} * x_0[/tex]
[tex]x(t) = \left[\begin{array}{ccc}1&t\\-6t&1-5t+t^2/2\end{array}\right] * \left[\begin{array}{ccc}-1\\-2\end{array}\right][/tex]
By performing the matrix multiplication, we obtain the solution:
x(t) = [[-t - 2e^(-5t) + e^(-6t)], [-2t - e^(-5t) + e^(-6t)]]
Therefore, the solution to the initial value problem dx/dt = ax, with [tex]x(0) = x_0[/tex] and [tex]a = \left[\begin{array}{ccc}0&1\\-6&-5\end{array}\right][/tex], where [tex]x_0 =\left[\begin{array}{ccc}-1\\-2\end{array}\right][/tex], is [tex]x(t) =\left[\begin{array}{ccc}-t - 2e^(-5t) + e^(-6t)\\-2t - e^(-5t) + e^(-6t)\end{array}\right][/tex].
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At a point 20m from the base of a water tank, the angle of elevation of the top of the tank is 45 degrees. What is the height of the tank?
Answer:
my answer is 20
Step-by-step explanation:
tan 45=opposite/adjacent
1 =opposite*20.
opposite=20cm
let dx be the linear transformation from c' [a, b] into c[a, b]. find the preimage of the function. (use c for the constant of integration.) dx(f) = 4x 2
The given linear transformation dx maps a function f(x) to its derivative, dx(f) = 4x^2. To find the preimage, we need to determine the original function f(x) that satisfies this derivative.
By integrating the derivative with respect to x, we can find the antiderivative F(x) of 4x^2. The antiderivative is obtained by reversing the process of differentiation.
The antiderivative of 4x^2 is (4/3)x^3, where (4/3) is the coefficient of the term and x^3 is the term raised to the power one higher than the exponent in the derivative. The constant of integration C is added to account for the family of functions that have the same derivative.
Therefore, the preimage of the function dx(f) = 4x^2 is F(x) = (4/3)x^3 + C, where C represents any constant value.
PLS HELP! LATE ASSIGNMENT!!!
It was due last night and it is worth 15% of class mark! pls show all steps!!! I WILL MAKE U BRAINLIST
The key elements of the graph are completed as below
a b
Direction of Opening Down up
Vertex (x, y) (-3, 4) (2, 1)
Is there a max or min? max min
What is the max or min? 4 1
Axis of symmetry x = -3 x = 2
X-intercepts (-4, 0) and (-1, 0) imaginary
Y-intercept (0, -5) (0, 3)
What is x intercept of a parabola?The x-intercept of a parabola is the point(s) where the parabola intersects the x-axis. Geometrically the x-intercepts are the points where the y coordinate of the parabola is equal to zero, this is also called the roots
In the case of b, the roots are imaginary and hence are not shown on the graph
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Help meeeeee pleaseeeeeee
The probability that they are in middle school is 0.067.
We are given that;
The table of middle school, high school and total.
Now,
The probability that a student selected at random is a middle school student who was present is calculated by dividing the number of middle school students present by the total number of students present.
1,276/8,632≈0.148
The probability that a high school student selected at random was absent on that day is calculated by dividing the number of high school students absent by the total number of high school students.
12,118/12,68≈0.167
The probability that a student who was present that day is in middle school is calculated by dividing the number of middle school students present by the total number of students present.
1,276/19,195≈0.067
Therefore, by probability the answer will be 0.067
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pls help 50 points!!!!!!
it is on khan!!!
Answer:
5
Step-by-step explanation:
Well, there are 4 "s" blocks that make up one "20" units block. So all you have to do is to divide 20/4 to get 5.
Suppose that the constant marginal cost per trip of a taxi ride is $5, and that the average taxi has a capacity of 20 trips per day. Let the demand function for taxi rides be given by D(P) = 1200 – 20p, where the demand is measured in rides per day, and price is measured in dollars. Assume that the industry is perfectly competitive. (1) What is the competitive equilibrium price per ride? (Hint: in competitive equi- librium, price must equal marginal cost.) What is the equilibrium number of rides per day? How many taxicabs will there be in equilibrium?
(2) In 1990, the city council created a taxicab licensing board and issues a license to each of the existing cabs. The board stated that it would continue to adjust the taxicab fares so that the demand for rides equals the supply, but no new licenses will be issued in the future. In 1995 costs hadn't changed, but the demand curve for taxicab rides had become D(n) = 1220 – 20p. What was the equilibrium price of a ride in 1995? 1 (3) What was the profit per ride in 1995, neglecting any costs associated with ac- quiring a taxicab license? What was the profit per taxicab license per day? If the taxi operated everyday, what was the profit per taxicab license per year? (4) If the interest rate was 10% and costs, demand and the number of licenses were expected to remain constant forever, what would be the market price of a taxicab license? (5) Suppose that the board decided in 1995 to issue enough new licenses to reduce the taxicab price per ride to $5. How many more licenses would this take? (6) Assuming that the demand in the city is not going to grow any more, how much would a taxicab license be worth at this new fare? (7) How much money would each current taxicab owner be willing to pay to prevent any new licenses form being issued? What is the total amount that all taxicab owners together would be willing to pay to prevent any new licenses from ever being issued? Would the total amount that the consumers would be willing to pay to have another taxicab license issued, be more than, less than or the same as this amount?
If the taxi operated every day, the annual profit per taxicab license would be $8,030. The market price of a taxicab license, assuming a 10% interest rate and constant conditions, would be $220. The number of additional licenses needed to reduce the taxicab price per ride to $5 would depend on the demand and supply conditions.
(1) The competitive equilibrium price per ride is determined by setting the price equal to the marginal cost. Thus, the competitive equilibrium price is $5. The equilibrium number of rides per day can be calculated by substituting the price into the demand function D(P) = 1200 - 20p, giving 1,000 rides.
(2) In 1995, the demand curve changed to D(n) = 1220 - 20p. By setting the demand equal to the supply, the equilibrium price of a ride in 1995 can be determined, which is $6.10.
(3) The profit per ride in 1995, can be calculated by subtracting the marginal cost ($5) from the equilibrium price ($6.10), resulting in a profit of $1.10 per ride. The profit per taxicab license per day is obtained by multiplying the profit per ride by the taxi capacity, resulting in $22. If the taxi operates every day, the annual profit per taxicab license will be $8,030.
(4) The market price of a taxicab license can be determined by discounting the annual profit per taxicab license, resulting in $220.
(5) The exact number of additional licenses needed would depend on the specific demand and supply conditions.
(6) The value of a taxicab license at the new fare of $5 would depend on the expected profits generated at that price.
(7) It depends on the perceived impact on their profits and on their individual valuations and expectations.
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Which of the following is NOT a requirement of testing a claim or constructing a confidence interval estimate for two population portions? Choose the correct answer below. a.The sample is at least 5% of the population. b.For each of the two samples, the number of failures is at least 5. c.The sample proportions are from two simple random samples that are independent.d.For each of the two samples, the number of successes is at least 5.
The answer is b. For each of the two samples, the number of failures is at least 5.
This is not a requirement for testing a claim or constructing a confidence interval estimate for two population proportions. However, it is a requirement for using the normal approximation to the binomial distribution. The other requirements include having a sample size that is at least 5% of the population, having simple random samples that are independent, and having each sample with at least 5 successes.
The correct answer is: b. The sample is at least 5% of the population. This is NOT a requirement for testing a claim or constructing a confidence interval estimate for two population proportions. The other options (b, c, and d) are indeed requirements.
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If f(x) = 2x - 3 and g(x) = (x + 7), then find f(g(x)). a) 2x + 4b) 2x + 11c) x + 11 d) 3x + 4
To find f(g(x)), we have to substitute the formula for g(x) as the input for f(x).
f( g(x) ) = f( x+7 )
= 2 (x+7) - 3
= 2x + 14 - 3
= 2x + 11
The key is to substitute the entire formula for g(x) in as the input for f.
the loan-to-value ratio measures the amount of leverage in a real estate investment project. true or false
True. The loan-to-value ratio is a calculation that compares the amount of the loan being taken out for a real estate investment project to the value of the property being purchased. This ratio is often used to determine the amount of leverage being used in the investment, with higher ratios indicating more leverage and potentially higher risk.
The LTV ratio indicates the percentage of the property's value that is financed through debt. Higher LTV ratios indicate a higher level of leverage, meaning that a larger portion of the property's value is funded through borrowed money. LTV ratios are commonly used by lenders to assess the risk associated with a real estate investment and determine the terms of the loan.
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define an inner product on mଶଶ by: 〈u, v〉= tr(u^t * v). determine whether a and b are orthogonal in the resulting inner product space.
To determine whether a and b are orthogonal in the resulting inner product space defined by 〈u, v〉= [tex]tr(u^t * v)[/tex], we need to compute 〈a, b〉 and check if it equals zero.
How do we determine if vectors a and b are orthogonal in the inner product space?In the given inner product space, orthogonality between two vectors a and b is determined by checking if their inner product, denoted as 〈a, b〉, equals zero.
To find this inner product, we calculate the trace of the matrix product of the transpose of a [tex](a^t)[/tex] and b, and then compare the resulting value to zero. If 〈a, b〉 is zero, it implies that a and b are orthogonal in the inner product space. If the inner product is nonzero, a and b are not orthogonal.
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Can anyone help please?
Answer:
12.9 cm
Step-by-step explanation:
area of full circle = 2 X 65.8 = 131.6cm².
131.6 = π r² = (3.14r²)
r² = 131.6/3.14 = 41.9108....
r = 6.47.
diameter = 2r = 12.94 = 12.9 cm to nearest tenth
ind an equation of the plane. the plane through the points (0, 6, 6), (6, 0, 6), and (6, 6, 0)
The equation of the plane passing through the points (0, 6, 6), (6, 0, 6), and (6, 6, 0) is: 1296x + 1296y + 1296z - 15552 = 0.
To locate an equation of the aircraft passing thru three given points, we can use the point-normal structure of the equation of a plane.
The ordinary vector of the aircraft can be determined through taking the move product of two vectors in the plane.
Find two vectors in the airplane the usage of the given points:
Vector u = (6, 0, 6) - (0, 6, 6) = (6, -6, 0)
Vector v = (6, 6, 0) - (0, 6, 6) = (6, 0, -6)
Calculate the move product of vectors u and v to locate the ordinary vector of the plane:
Normal vector n = u x v
= (6, -6, 0) x (6, 0, -6)
= (-36, 36, 36)
Step 3: Use one of the given factors (0, 6, 6) and the regular vector (-36, 36, 36) in the point-normal structure of the equation of a plane:
(x - x₁, y - y₁, z - z₁) · (A, B, C) = 0, the place (x₁, y₁, z₁) is the factor and (A, B, C) is the regular vector.
(x - 0, y - 6, z - 6) · (-36, 36, 36) = 0
(-36x, 36y - 216, 36z - 216) · (-36, 36, 36) = 0
Simplifying the equation, we get:
(-36x)(-36) + (36y - 216)(36) + (36z - 216)(36) = 0
1296x + 1296y - 7776 + 1296z - 7776 = 0
1296x + 1296y + 1296z - 15552 = 0
Therefore, an equation of the airplane passing thru the factors (0, 6, 6), (6, 0, 6), and (6, 6, 0) is:
1296x + 1296y + 1296z - 15552 =
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20. Solve for mZA of the triangle.
c=302
a = 289
b=344
[tex]\textit{Law of Cosines}\\\\ \cfrac{a^2+b^2-c^2}{2ab}=\cos(C)\implies \cos^{-1}\left(\cfrac{a^2+b^2-c^2}{2ab}\right)=\measuredangle C \\\\[-0.35em] ~\dotfill\\\\ \cos^{-1}\left(\cfrac{302^2+344^2-289^2}{2(302)(344)}\right)=\measuredangle A \implies \cos^{-1}\left(\cfrac{ 126019 }{ 207776 }\right)=\measuredangle A \\\\\\ \cos^{-1}(0.6065137) \approx \measuredangle A \implies 52.66^o \approx \measuredangle A[/tex]
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