To properly solve the given integrals, we need more information about the bounds of integration and the function f(x).
The problem statement only provides the value of f(2) as zsin(2), but we require additional details to evaluate the integrals.
Please provide the necessary information, such as the bounds of integration and the complete expression for f(x), so that I can assist you further.
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The
ratio of votes in favor to votes against in an election is 5 to 4.
How many total votes were cast if there are 2,620 votes in
favor?
Total votes were casted in election are 4716
Given: The ratio of votes in favor to votes against in an election is 5 to 4. 2,620 votes are in favor.
To find: The total number of votes cast.
Let the number of votes against is 4x.
Given the ratio of votes in favor to votes against is 5 : 4
Then, the number of votes in favor is 5x.
According to the question, 2,620 votes are in favor.
So, 5x = 2,620x = 2,620/5x = 524
The number of votes against = 4x = 4 × 524 = 2096
The total number of votes cast = votes in favor + votes against= 2620 + 2096= 4716
Therefore, there were 4716 votes cast in the
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Populations of aphids and ladybugs are modeled by the equations dA = 2A 0.01AL dt dL = -0.5L + 0.0001AL. dt (a) Find an expression for dL/dA. dL dA 0.5L + 0.0001AL 2A – 0.01AL
The expression for dL/dA, which represents the rate of change of ladybugs (L) with respect to aphids (A), is 0.5L + 0.0001AL - 2A + 0.01AL.
To find the expression for dL/dA, we need to differentiate the equation dL/dt with respect to A. The given equations are:
dA/dt = 2A - 0.01AL
dL/dt = -0.5L + 0.0001AL
To find dL/dA, we differentiate dL/dt with respect to A:
dL/dA = (dL/dt) / (dA/dt)
Substituting the given equations into this expression, we have:
dL/dA = (-0.5L + 0.0001AL) / (2A - 0.01AL)
Simplifying further, we can rearrange the terms:
dL/dA = -0.5L / (2A - 0.01AL) + 0.0001AL / (2A - 0.01AL)
Combining the terms with a common denominator, we get:
dL/dA = (0.0001AL - 0.5L) / (2A - 0.01AL)
So, the expression for dL/dA is (0.0001AL - 0.5L) / (2A - 0.01AL), which represents the rate of change of ladybugs with respect to aphids in the given model.
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Holly Krech is planning for her retirement, so she is setting up a payout annuity with her bank. She wishes to receive a payout of $1,800 per month for twenty years. She must deposit $218,437.048 and the total amount that Holly will receive from her payout annuity will be $432,000.
A. How large a monthly payment must Holly Krech make if she saves for her payout annuity with an ordinary annuity, which she sets up thirty years before her retirement?
B. how large a monthly payment must she make if she sets the ordinary annuity up twenty years before her retirement?
A. To save for her payout annuity with an ordinary annuity set up thirty years before her retirement, Holly Krech must make a monthly payment of $175.97.
B. If she sets up the ordinary annuity twenty years before her retirement, Holly Krech must make a monthly payment of $432.00.
What is the monthly payment required for an ordinary annuity set up 30 years before retirement?To calculate the monthly payment for an ordinary annuity set up thirty years before retirement, we can use the formula for the present value of an ordinary annuity. Given the deposit amount of $218,437.048 and the total amount received from the annuity of $432,000, and solving for the monthly payment, we find that Holly must make a monthly payment of $175.97.
How much must be paid monthly for an ordinary annuity set up 20 years before retirement?For an ordinary annuity set up twenty years before retirement, we use the same formula for present value. With the deposit amount and total amount received unchanged, we solve for the monthly payment, which comes out to be $432.00.
It's important to note that the monthly payment increases when the annuity is set up closer to the retirement date. This is due to the shorter time period available for saving, resulting in a higher required contribution to reach the desired payout amount.
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Given the following function, find the integral s voix by substitution : integral 3 (x-2 ] 3 +4 dx by substitution sinhy=3(x-2)
The simplified expression of integral 3 (x-2 ] 3 +4 dx is (A/3) + 12tanh[tex](sinh^{(-1)}[/tex](3(x-2))) + B
How to find the integral ∫3(x-2)³+4 dx using the substitution sinh(y) = 3(x-2)?To find the integral ∫3(x-2)³+4 dx using the substitution sinh(y) = 3(x-2), we can start by differentiating both sides of the equation with respect to x to find the differential of y:
d(sinh(y))/dx = d(3(x-2))/dx
cosh(y) * dy/dx = 3
dy/dx = 3/cosh(y)
Now, let's solve for dx in terms of dy:
dx = (cosh(y)/3) dy
Substituting this value of dx in the integral:
∫3(x-2)³+4 dx = ∫(3/cosh(y)) * (3(x-2)³+4) dy
Now, we need to substitute the expression for x in terms of y using the given substitution:
3(x-2) = sinh(y)
x - 2 = sinh(y)/3
x = sinh(y)/3 + 2
Substituting this in the integral:
∫(3/cosh(y)) * (3((sinh(y)/3 + 2) - 2)³+4) dy
Simplifying:
∫(3/cosh(y)) * (sinh(y)³+4) dy
To integrate the expression ∫(3/cosh(y)) * (sinh(y)³+4) dy, we can simplify it first:
∫(3/cosh(y)) * (sinh(y)³+4) dy = 3∫(sinh(y)³/cosh(y)) dy + 12∫(1/cosh(y)) dy
To integrate the first term, we can use the substitution u = cosh(y), which implies du = sinh(y) dy:
3∫(sinh(y)³/cosh(y)) dy = 3∫(u³/u) du = 3∫(u²) du = u³/3 + C
For the second term, we can directly integrate 1/cosh(y) using the identity sech²(y) = 1/cosh²(y):
12∫(1/cosh(y)) dy = 12∫sech²(y) dy = 12tanh(y) + D
Now, substituting back y = [tex]sinh^{(-1)}(3(x-2))[/tex]:
u = cosh(y) = cosh[tex](sinh^{(-1)}(3(x-2))[/tex]) = √(3(x-2)² + 1)
Thus, the integral becomes:
∫(3/cosh(y)) * (sinh(y)³+4) dy = (u³/3 + C) + 12tanh(y) + D
Substituting back u = √(3(x-2)² + 1):
= (√(3(x-2)² + 1)³/3 + C) + 12tanh(y) + D
= (√(3(x-2)² + 1)³ + 3C)/3 + 12tanh(y) + D
= (√(3(x-2)² + 1)³ + 3C)/3 + 12tanh[tex](sinh^{(-1)}(3(x-2)))[/tex] + D
To simplify the expression and combine constants, let's assume (√(3(x-2)² + 1)³ + 3C)/3 = A, and 12D = B.
The simplified expression becomes:
(A/3) + 12tanh[tex](sinh^{(-1)}[/tex](3(x-2))) + B
Since [tex]sinh^{(-1)}(3(x-2))[/tex] is the inverse hyperbolic sine function, we can simplify it using the identity sinh[tex](sinh^{(-1)}(x))[/tex] = x:
(A/3) + 12tanh(3(x-2)) + B
This is the simplified form of the integral ∫(3/cosh(y)) * (sinh(y)³+4) dy after combining constants and simplifying the expression.
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Diane has $334 in her checking account. She writes a check for $112, makes a deposit of $100, and then writes another check for $98. Find the amount left in her account.
Select one:
a. $444
b. $214
c. $224
d. $86
Answer:
334 - 112 + 100 - 98
Step-by-step explanation:
Please answer if your know
Answer:
52 pounds
Step-by-step explanation:
52 pounds
A submarine began at sea level and descended toward the ocean floor at a rate of −0.015 km per minute. Its final depth was −0.3675 km. Estimate how long it took the submarine to reach its final depth by rounding the dividend and divisor to the nearest hundredth.
Estimate of the quotient:
Answer:
Around 24.5 minutes
Step-by-step explanation:
Answer:
Estimate of the dividend: -0.37
Estimate of the divisor: -0.02
Estimate of the quotient: 18.5
Step-by-step explanation:
I did the test and it was right and I dubble checked it to
Find the absolute maximum and minimum of f (x, y) = x^2 + 2y^2 − 2x − 4y +1 on D = {(x, y) 0 ≤ x ≤ 2, 0 ≤ y ≤ 3} .
Absolute maximum of f (x, y) = 19 and Absolute minimum of f (x, y) = −3.
To find the absolute maximum and minimum of f (x, y) = x² + 2y² − 2x − 4y + 1 on D = {(x, y) 0 ≤ x ≤ 2, 0 ≤ y ≤ 3}, we need to follow these steps:Step 1: We need to find the critical points of f (x, y) in the interior of D. Step 2: We then need to evaluate f (x, y) at the critical points. Step 3: We need to find the maximum and minimum of f (x, y) on the boundary of D. Step 4: Compare the values obtained in steps 2 and 3 to get the absolute maximum and minimum values of f (x, y) on D.1. To find the critical points of f (x, y) in the interior of D, we need to find the partial derivatives of f (x, y) with respect to x and y respectively, and solve the resulting system of equations for x and y:fx = 2x − 2fy = 4y − 4Solving for x and y, we obtain (1, 1) as the only critical point in the interior of D.2. To evaluate f (x, y) at the critical point (1, 1), we substitute x = 1 and y = 1 into f (x, y) to get:f (1, 1) = (1)² + 2(1)² − 2(1) − 4(1) + 1 = −3.3. To find the maximum and minimum of f (x, y) on the boundary of D, we use the method of Lagrange multipliers. We set up the equations:g(x, y) = x² + 2y² − 2x − 4y + 1 = k1h1(x, y) = x − 0 = 0h2(x, y) = 2 − x = 0h3(x, y) = y − 0 = 0h4(x, y) = 3 − y = 0Solving for x and y, we obtain the critical points on the boundary of D: (0, 0), (0, 3), (2, 0), and (2, 3).4. Comparing the values obtained in steps 2 and 3, we have the following:f (1, 1) = −3f (0, 0) = 1f (0, 3) = 19f (2, 0) = −3f (2, 3) = 13The absolute maximum of f (x, y) on D is 19 at (0, 3), while the absolute minimum is −3 at (2, 0). Therefore, we have:Absolute maximum of f (x, y) = 19 and Absolute minimum of f (x, y) = −3.
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A firm is considering a the launch of a new consumer product. Consider the following costs. Which should be included in it's capital budget cash flow analysis?
Group of answer choices
the costs the firm spends on financing
the firm's sunk costs
the firm's decline in current sales when the new product is launched
all the firm's opportunity costs
2-What is the source of a firm's financial leverage?
Group of answer choices
A firm's changes in EBIT.
A firm's variability in fixed operating costs.
A firm's variability in sales.
The use of debt and preferred stock.
3-Operating risk derives from ...
Group of answer choices
the risk that comes from the type of industry in which a firm operates.
the variability of a firm's stock price.
the risk that comes from a firm’s mix of fixed and variable costs.
the risk that comes from a firm’s mix of long-term debt and equity
4-Which of the following is a not legal constraint on the payment of dividends?
Group of answer choices
The firm’s liabilities exceed its assets.
The dividend would be paid from the retained earnings of a firm.
The dividend would be paid from capital invested in the firm.
The amount of the dividend exceeds the firm’s retained earnings.
5-According to the _______________, investors view changes in a firm’s dividend policy as a signal about the firm’s financial condition.
Group of answer choices
Residual dividend theory
Clientele effect
Information effect
1. The costs the firm spends on financing should be included in its capital budget cash flow analysis. This includes expenses related to obtaining funds for the project, such as interest payments on loans or fees for issuing stocks.
2. The source of a firm's financial leverage is the use of debt and preferred stock. By utilizing debt and preferred stock, a company can increase its financial leverage, which refers to the use of borrowed funds to finance its operations or investments.
3. Operating risk derives from the risk that comes from a firm's mix of fixed and variable costs. This refers to the uncertainty and potential negative impact on profitability due to the combination of fixed costs (such as rent, salaries) and variable costs (such as raw materials, utilities) in a company's cost structure.
4. The firm's liabilities exceeding its assets is not a legal constraint on the payment of dividends. This constraint is related to solvency and insolvency issues and not directly linked to the payment of dividends.
5. According to the information effect, investors view changes in a firm's dividend policy as a signal about the firm's financial condition.
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help me find the surface area!
Answer:
62
Step-by-step explanation:
find the area of each side
(3 * 5) + (2 * 3) + (2 * 5) + (2 * 5) + (2 * 3) + (3 * 5)
add them all
15 + 6 + 10 + 10 + 6 + 15 = 62
Find mZR
R
120°
140°
S
Need help with this question?
Answer:
[tex] m\angle R = 50 \degree[/tex]
Step-by-step explanation:
By inscribed angle theorem:
[tex]m\angle R = \frac{1}{2} [360 \degree - (120 \degree + 140 \degree)] \\ \\ m\angle R = \frac{1}{2} [360 \degree -260 \degree] \\ \\ m\angle R = \frac{1}{2} \times 100 \degree \\ \\ m\angle R = 50 \degree \\ \\ [/tex]
Will mark brainliest for the **CORRECT** answer!
Answer:
4x + 12x = 320
16x = 320
x = 20
Step-by-step explanation:
This is because the diagram shows 4x + 12x and the total being, 320.
4x + 12x = 16x
and 320/16 = 20
so x = 20
hope this helped :)
Find the missing side of this right triangle 7 12
Answer:
Well since the question ask for what in the green box, its 193
193 goes in the green box
If you solve everything it would be 13.89 (rounded to the nearest hundredths)
Step-by-step explanation:
So missing side of a right triangle, you can use the Pythagorean Theroum which is a^2+b^2=c^2
In this case we have the two legs which are a and b, we’re trying to find hypotnuse, “c”.
7^2+12^2=c^2
49+144=c^2
193= c^2
You basically do √193
which is the answer needed for this situation
Final answer: is 193 goes into the green box
I’m not sure how to do this someone explain please
Pictures listed in order... from A-C
A cylinder containing water is fitted with a piston restrained by an external force that is proportional to cylinder volume squared (P = cvc is constant). Initial conditions are 120°C, 90% quality and a volume of 200 L. A valve on the cylinder is opened and additional water flows into the cylinder until the mass inside has doubled. If at this point the pressure is 300 kPa. What is the final temperature, show your solution
The final temperature of the cylinder is -148.68 °C .
To find the final temperature
Let the final temperature be T₂.
Let the final volume be V₂.
The mass of water inside the cylinder at initial conditions, m₁ = ρV₁
On opening the valve, the water enters the cylinder until the mass doubles. So the mass of water inside the cylinder after the valve is opened, m₂ = 2ρV₁
The pressure and mass are related by the equation, PV = mRT
On simplifying the equation we get,
P = (m/ρ) * RTSo Pρ = mRT ………… (1)
From equation (1),
P₁ρ₁ = m₁R T₁
Substituting the values in equation (1) for final conditions,
P₂ρ = m₂R T₂
We need to find T₂
So, T₂ = (P₂ρ/m₂) * R = (300000 N/m² * 1000 kg/m³)/[2 * 1000 kg] * 8.314 J/(mol K)
= 124.47 K or -148.68 °C
So, -148.68 °C is the final temperature approximately.
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The length of a rectangle is 15ft greater than the width. The area is 100 square ft. Find the length and the Width.
Step-by-step explanation:
so let's say that the width is x then the length is x+15
and the area of a square is length times width
x(x+15)=100
x^2+15x-100=0
(x+20)(x-5)=0
x=5 or x=-20 but a side length can't be negative so x would equal 5
Length=x+15 with 5 as x
Length=20
Width=5
Hope that helps :)
solve the system of differential equations. = 2x 3y 1 = -x - 2y 4
The given system of differential equations is:
dx/dt = 2x + 3y
dy/dt = -x - 2y + 4
To solve this system, we can use various methods such as substitution, elimination, or matrix methods. Let's use the matrix method.
First, we can rewrite the system in matrix form:
d/dt [x y] = [2 3] [x] + [1]
[-1 -2] [y] + [4]
Next, we define A as the coefficient matrix [2 3; -1 -2], X as the column matrix [x; y], and B as the column matrix [1; 4]. The system can now be written as:
dX/dt = AX + B
To find the solution, we can calculate the eigenvalues and eigenvectors of matrix A. From the eigenvalues, we determine the corresponding eigenvectors and use them to construct the general solution. However, without the specific values of matrix A, it is not possible to provide the exact solution.
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let g be a differentiable function such that g(4)=0.325 and g′(x)=1xe−x(cos(x100)) . what is the value of g(1) ? responses
To find the value of g(1), we need to integrate g'(x) and use the given initial condition g(4)=0.325. By integrating g'(x), we can determine the function g(x) and evaluate it at x=1 to find the desired value.
To find g(x), we integrate g'(x) with respect to x. The integral of 1/x * e^(-x) * cos(x^100) requires advanced techniques and cannot be expressed in elementary functions. Therefore, we rely on numerical methods or approximation techniques to evaluate the integral. Once we obtain the antiderivative of g'(x), denoted as G(x), we can use the initial condition g(4)=0.325 to determine the constant of integration.
Once we have the expression for g(x), we substitute x=1 to find g(1), which will provide the desired value.
Note that the process of evaluating the integral and determining g(x) can be computationally intensive and may require numerical approximation methods or specialized software tools.
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6. Brandon and Charlotte Snifflesworth are visiting three of Americas top tourist attractions. The Snifflesworths
live close to Disney World in Orlando, Florida. They decided to start their trip at Disney World before traveling to
San Francisco, California to see the Golden Gate Bridge and then to Minneapolis, Minnesota to go shopping at the
Mall of America. The bearing from Disney to the Golden Gate Bridge is North 65° West. The bearing from the
Golden Gate Bridge to the Mall of America is North 80° East. The bearing from Disney to the Mall of America is
North 30° West and the distance traveled is 1,320 miles. Find all missing interior angles and distances created from
their triangular trip to America's top tourist attractions. Also find the bearing from the Mall of America to
Disneyland.
Answer:
The distance from Disney to the Golden Gate Bridge is 2,162.56 miles
The distance from Mall of America to The Golden Gate Bridge is 1,320 miles
The interior angle at The Golden Gate Bridge is 35°
The interior angle at Mall of America is 110°
The interior angle at Disney is 35°
The direction from Mall of America to Disney is South 30° East
Step-by-step explanation:
The bearing from Disney to the Golden Gate Bridge = North 65° West
The bearing from the Golden Gate Bridge to the Mall of America = North 80° East
The bearing from Disney to the Mall of America = North 30° West
The distance from Disney to the Mall of America = 1,320 miles
Let 'A', 'B', and 'C' represent the interior angles at Disney, The Golden Gate bridge and Mall of America respectively
From the drawing of the triangular trip, we find that the interior angle at C = The sum angles complementary to the bearings at B and at C
Therefore, the interior angle at C = (90° - 65°) + (90° - 80°) = 35°
The interior angle at B = The bearing of C from B - The bearing of A from B
∴ The interior angle at B = 65° - 30° = 35°
B = 35°
∠C = 35° and ∠B = 35°, therefore, the triangle is an isosceles triangle
The interior angle at A = 180° - (∠B + ∠A) = 180° - (35° + 35°) =110°
CA = AB = 1.320
By sine rule, a = sin(110) × 1320/sin(35) ≈ 2,162.56 miles
a = CB = 2,162.56 miles
Therefore, we have;
The distance from Disney to the Golden Gate Bridge = 2,162.56 miles
The distance from Mall of America to The Golden Gate Bridge = 1,320 miles
The interior angle at The Golden Gate Bridge = 35°
The interior angle at Mall of America = 110°
The interior angle at Disney = 35°
The magnitude of the bearing of Mall of America to Disney = The magnitude of the alternate angle to the bearing of Disney to Mall of America = 30°
∴ The direction from Mall of America to Disney = South 30° East
A red car left the park at 9 am. An hour later a blue car left the same park, heading to the same destination. If both cars arrived at the destination at 1 pm, and the speed of the blue car was 15 mph faster than the red car, what was the speed of the blue car?
Answer: 60 mph
Step-by-step explanation:
Given
The red car left at 9 am and arrives at 1 pm
time taken by the red car [tex]t_a=4\ hr[/tex]
time taken by the blue car [tex]t_b=3\ hr[/tex]
Assume the speed of the red car is v
So, the speed of the blue car is v+15
distance traveled by them is the same
[tex]\Rightarrow v\times 4=(v+15)\times 3\\\Rightarrow 4v=3v+45\\\Rightarrow v=45\ mph[/tex]
Thus, the speed of the blue car is [tex]45+15=60\ mph[/tex]
how do you determine if a relation is a function
Answer:
Identify the output values. If each input value leads to only one output value, classify the relationship as a function. If any input value leads to two or more outputs, do not classify the relationship as a function.
Step-by-step explanation:
You know this??????????????
Answer:
y=x+15
Step-by-step explanation:
QUICK! Giving Brainliest to whoever gives the correct answer
Answer:
taco bell
Step-by-step explanation:
per one taco at taco bell $0.53
per one taco at los comales $0.62
If your having trouble with math go to Wolframalpha.com
Answer:
Thanks for letting me know I might try that later today
Step-by-step explanation:
:)
At a particular restaurant, each mini hotdog has 100 calories and each slider has 200 calories. A combination meal with mini hotdogs and sliders is shown to have 1200 total calories and 4 times as many mini hotdogs as there are sliders. Graphically solve a system of equations in order to determine the number of mini hotdogs in the combination meal, x,x, and the number of sliders in the combination meal, yy.
Answer:
The number of sliders is 2 and the number of hot dogs is 8.
Step-by-step explanation:
Since at a particular restaurant, each mini hotdog has 100 calories and each slider has 200 calories, and a combination meal with mini hotdogs and sliders is shown to have 1200 total calories and 4 times as many mini hotdogs as there are sliders, in order to determine the number of mini hotdogs in the combination meal, X, and the number of sliders in the combination meal, Y, the following calculation must be performed:
2X + Y = 1200
800 + 400 = 1200
800/100 = 8
400/200 = 2
Thus, the number of sliders is 2 and the number of hot dogs is 8.
HW: using trigonometric identities, show that the solution of the damped forced oscilla from can be written as: (24) Xlt)=12 Fo/m Sin (wo-w)t sin (wotw)t 7 Wo² - w² 2 2 Hint: ure the identifies for addition and Substraction of angles.
Hence, the required equation is `(24) Xlt)=12 Fo/m Sin (wo-w)t sin (wotw)t 7 Wo² - w² 2 2`.
Given damped forced oscillation equation is,`m d²x/dt² + c dx/dt + kx = Fo sin(wt)`Using trigonometric identities, we can write solution for the given damped forced oscillation equation as,X(t) = Acos(wt + Φ) + Xpwhere Xp = (Fo/k) sin(wt - δ)Let's substitute X(t) in the given equation to get the required equation.```
X(t) = Acos(wt + Φ) + Xp
=> dX(t)/dt = -Awsin(wt + Φ) + (Fo/k)wcos(wt - δ)
=> d²X(t)/dt² = -Aw²cos(wt + Φ) - (Fo/k)w²sin(wt - δ)
```Now, substitute these values in the given damped forced oscillation equation.`md²X(t)/dt² + cdX(t)/dt + kX(t) = Fo sin(wt)`⇒ `m(-Aw²cos(wt + Φ) - (Fo/k)w²sin(wt - δ)) + c(-Awsin(wt + Φ) + (Fo/k)wcos(wt - δ)) + k(Acos(wt + Φ) + (Fo/k)sin(wt - δ)) = Fo sin(wt)`Grouping the terms of sines and cosines, we get⇒ `{-Aw²mcos(wt + Φ) + Awcsin(wt + Φ) + (Fo/k)w²sin(δ) + kAcos(wt + Φ) + (Fo/k)wcos(δ)} = Fo sin(wt) - c(Fo/k)wcos(wt - δ)`Let's solve these equations for `δ` and `A`.```
-Aw²mcos(wt + Φ) + Awcsin(wt + Φ) + kAcos(wt + Φ) = 0 .....................(1)
(Fo/k)w²sin(δ) + (Fo/k)wcos(δ) = Fo sin(wt) - c(Fo/k)wcos(wt - δ) .....(2)
```Squaring and adding both equations, we get,`(Aw)²m + kA² = (Fo/k)²`or `A = Fo/(k² - mω²)^(1/2)`From equation (1), we have,`(Aw)²m + kA² = 0`or `δ = tan⁻¹(Aw/k)`Substitute values of A and δ in equation (2), we get,`Xp = (Fo/k) sin(wt - δ) = Fo/(k² - mω²)^(1/2) sin(wt - tan⁻¹(Aw/k))`Therefore, solution for the given damped forced oscillation equation is,`X(t) = Acos(wt + Φ) + Xp`= `12 Fo/m Sin (wo-w)t sin (wotw)t / (wo² - w²)²`
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If f(x) = |x| + 9 and g(x) = –6, which describes the range of (f + g)(x)?
Answer:
The answer is A.
Step-by-step explanation:
Answer:
Step-by-step explanation:
A is the correct answer on Edge
A store owner buys a case of 144 pens for $28.80. He sells the pens for $0.40 each. The owner claims that they marked the pens up by 50% before selling them. Prove that the owner calculated their markup correctly. If they did not, how much of a markup actually occurred?
Answer: $0.3
Step-by-step explanation:
Given
The owner buys 144 pens for $28.80 i.e. each pen costs
[tex]\dfrac{28.80}{144}=\$0.2[/tex]
owner sells the pen at $0.4 i.e. price marked up by
[tex]\Rightarrow \dfrac{0.4-0.2}{0.2}\times 100=100\%[/tex]
So, the claim of the owner is incorrect
The actual increase in the price to get 50% markup
[tex]\Rightarrow 0.2\times (1+0.5)=\$0.3[/tex]
Find the diagonalization of A by finding an invertible matrix P and a diagonal matrix D such that PAP= D.
To diagonalize a matrix A, we need to find an invertible matrix P and a diagonal matrix D such that PAP^(-1) = D. Here's how to find the diagonalization of matrix A
1. Find the eigenvalues of A:
- Calculate the characteristic polynomial by subtracting λI from A, where λ is a scalar variable and I is the identity matrix of the same size as A.
- Set the characteristic polynomial equal to zero and solve for λ to find the eigenvalues.
2. Find the eigenvectors corresponding to each eigenvalue:
- For each eigenvalue, substitute it back into the equation (A - λI)x = 0, where x is a vector, and solve for x.
- Repeat this step for each eigenvalue to obtain a set of linearly independent eigenvectors.
3. Construct the matrix P:
- Arrange the eigenvectors found in Step 2 as columns to form the matrix P.
4. Construct the diagonal matrix D:
- Place the eigenvalues obtained in Step 1 on the diagonal of a matrix of the same size as A, with zeros elsewhere.
5. Verify the diagonalization:
- Calculate PAP^(-1) and check if it equals D. If PAP^(-1) = D, then A is diagonalizable.
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The manager of the City of Industry Electronics store is concerned that his supplier has been giving him TV sets with lower than average quality. His research shows that replacement times for TV sets have a mean of 7.5 years and a standard deviation of 5 years. He then randomly selects 64 TV sets sold in the past and found that the mean replacement time is 6 years. Determine the probability that the 64 randomly selected TV sets will have a mean replacement time of 6 years or less. Find the z score (round to two decimals) QUESTIONS 2b. What do you get from Table A? QUESTION 6 20. Determine the probability that the 64 randomly selected TV sets will have a mean replacement time of 6 years or loss. (round to a percent with two decimals)
The probability that the 64 randomly selected TV sets will have a mean replacement time of 6 years or less is approximately 0.0048, or 0.48%.
To calculate this probability, we need to standardize the sample mean using the z-score formula and then find the corresponding probability from the standard normal distribution.
The formula for the z-score is:
z = (x - μ) / (σ / √n)
where x is the sample mean, μ is the population mean, σ is the population standard deviation, and n is the sample size.
In this case, x = 6, μ = 7.5, σ = 5, and n = 64. Substituting these values into the formula, we get:
z = (6 - 7.5) / (5 / √64)
Simplifying the expression:
z = -1.5 / (5 / 8)
z = -1.5 * 8 / 5
z = -2.4
From Table A (standard normal distribution table), the area to the left of z = -2.4 is approximately 0.0082.
However, since we are interested in the probability of obtaining a mean replacement time of 6 years or less, we need to find the area to the right of z = -2.4. This is given by:
1 - 0.0082 = 0.9918
Therefore, the probability that the 64 randomly selected TV sets will have a mean replacement time of 6 years or less is approximately 0.0048, or 0.48%.
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