Answer: 56 miles
Step-by-step explanation:
Tristan ran 7 miles, multiply by 4 because Kimberly ran 4 times as many miles as Tristan. 7x4=28
Next, 28x2=56 because Dominic ran 2 times as many miles as Kimberly, which is 28 times 2.
So Dominic ran 56 miles in total.
In fractions what is the probability that a teenager selected at random is female and their favourite hobby is watching films
The probability that a teenager selected at random is female and their favourite hobby is watching films is 1/4.
What is probability?A probability is given by the number of desired outcomes divided by the number of total outcomes.
From the information given, there is a total of 32 teenagers. Of those, 8 are female with a favorite hobby of watching films.
Therefore, the probability will be:
= Female who watch films / Total teenagers
= 8/32
= 1/4.
The probability is 1/4.
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Complete question
A group of teenagers is asked about their favorite hobbies. The results are shown in the following table: Sports Playing video games Watching films Total
Male 9 2 3 14
Female 7 3 8 18
Total 16 5 11 32
Q6a. In fractions, what is the probability that a teenager selected at random is female and their favourite hobby is watching films? You can simplify this fraction if you wish.
Determine f(5) for A piecewise function f of x in three pieces. The function is defined by part 1, which is x cubed for x less than negative 3, part 2, which is 2 times x squared minus 9 for negative 3 is less than or equal to x which is less than 4, and part 3 which is 5 times x plus 4, for x greater than or equal to 4.
11
29
41
125
The value of the function when the value of x is 5 is 29.
What is Function?In mathematics, a function is represented as a rule that produces a distinct result for each input x. In mathematics, a function is indicated by a mapping or transformation. Typically, these functions are identified by letters like f, g, and h. The collection of all the values that the function may input while it is defined is known as the domain. The entire set of values that the function's output can produce is referred to as the range. The set of values that could be a function's outputs is known as the co-domain.
Given:
[tex]f(x)= \left \{ {{x^3 \;\;\;\;\;\; x < -3} \atop {2x^2-9\;\;\;-3\leq x < 4}} \atop {5x+4\;\;\;x > 4}}\right.[/tex]
As the value of the function is to be found when the value of x is 5.
So, we can write the function as,
f(5) = 5x + 4
f(5) = 5(5) + 4
f(5) = 29
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Three cards are drawn with replacement from a standard deck of 52 cards. Find the the probability
that the first card will be a spade, the second card will be a black card, and the third card will be a ten.
Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.
The fraction in lowest terms or a decimal rounded to the nearest tenth is 0.0096.
Given that,
A normal 52-card deck is used to randomly select three cards.
We have to find the probability that a spade, a black card, and a ten will be dealt as the first, second, and third cards, respectively.
Three cards are drawn with replacement from a standard deck so for the first one i.e heart , probability is (13/52)=0.25
for 2nd one i.e red it is (26/52)=0.5
for 3rd one i.e queen it is (4/52)=0.0769
thus, the answer is 0.25*0.5*0.0769=0.0096
Therefore, The fraction in lowest terms or a decimal rounded to the nearest tenth is 0.0096.
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Binomial Distribution Assignment
A manufacturer of halogen bulbs knows that 3% of the production of their 100 W bulbs will be defective. A carton
contains 12 bulbs.
-What is the probability that exactly 5 bulbs in a carton of 144 bulbs will be defective?
-What is the probability that at most 2 bulbs will be defective?
-What is the probability that at least 1 bulb will be defective?
-What is the probability that between 3 and 6 bulbs will be defective?
7
The binomial distribution is a parametric probability distribution with two parameters, X and B. For a large number of trials, n, binomial probability tends to follow a continuous normal probability distribution.
What is meant by binomial distribution?The binomial distribution is a type of probability distribution that models the likelihood of one of two outcomes given a set of parameters. It sums up the number of trials when each trial has the same chance of achieving a single outcome.
Therefore,
The following is the definition of the Binomial distribution's probability mass function:
P (X = x) = (n x)p x(1p)n x, where x = 0, 1, 2, 3,..., n
Given,
Probability of defective, p = 0.03
Number of bulbs, n = 144
(i) The required probability is P(X = 5).
P(X = 5) = (1445) 0.035(1 − 0.03)144 − 5
= 144151 × (144 − 5) 1 × 0.035(1 − 0.03)144 − 5 ≈ 0.169
Within a carton of 144 bulbs, there is a 0.169 percent chance that 5 of them will be defective.
(ii) The required probability is P(X>2).
P(X>2) = 1 − P(X≤2)
= 1 − P(X = 0) − P(X = 1) − P(X = 2)
= 1 − 144101 × (144 − 0)10.030
Then simplifying,
(1 − 0.03)144 − 0 − 14411 × (144 − 1) 10.031 (1 − 0.03)144 − 1 − 14412 × (144 − 2)10.032 (1 − 0.03)144 − 2
= 1 − 0.01245 − 0.0554 − 0.1226
= 0.810
There is a 0.810 percent chance that there will be more than two faulty bulbs in a carton of 144 bulbs.
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You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your data set is 0. How confident can you be that your predicted value will be reasonably close to the actual value?
I can’t be confident at all; this is about as close to a random guess as you can get.
I can be a little confident; it might be close, or it might be way off.
I can be very confident; it will be close, but it probably won’t be exact.
I can be certain that my predicted value will match the actual value exactly.
With a correlation coefficient of 0, A. I can’t be confident at all; this is about as close to a random guess as you can get.
What is a correlation coefficient?A correlation coefficient measures the strength of the linear relationship between two variables.
Correlation coefficients usually range between -1 to 1, and they show how one variable moves in relation to another.
A positive correlation coefficient indicates that the two variables move uniformly in the same direction, while a negative correlation coefficient shows the opposite.
A zero correlation coefficient shows no linear relationship between the two variables.
Thus, if the correlation coefficient is 0, then Option A is correct.
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The product of two consecutive integers is 110. Find the integers. Note: There are two sets of answers. The first set contains only positive answers and the second one contains only negative answers. Provide the answers in ascending order (smaller numbers first, greater numbers second)
Answer:
10 and 11
or
-11 and -10
Step-by-step explanation:
40 POINTS AND BRAINLIEST!! <3
Determine the number of subsets contained in Q if Q={x∣∣x is an even, positive integer and x < 27}
The number of subsets contained in Q if Q={x∣∣x is an even, positive integer and x < 27] is 13.
What is a subset?A subset implies a part of the mathematical concept that's referred to as the set. The set is the collection of the elements that are grouped in the curly braces.
In this case, since x is an even number and less than 27, this will be:
2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, and 26.
Therefore, the numbers are 13.
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Use the discriminant to determine the number of solutions to the quadratic equation
m² - 9m + 3 = 0.
Answer: 2 real solutions
Step-by-step explanation:
The discriminant is [tex](-9)^2 -4(1)(3)=69[/tex].
Since the discriminant is positive, there are 2 real solutions.
The student academic group on a college campus claims that freshman students study at least 2.5 hours per day, on average. One Introduction to Statistics class was skeptical. The class took a random sample of 30 freshman students and found a mean study time of 135 minutes with a standard deviation of 44 minutes. At
= 0.01 level, is the student academic group's claim correct?
1. What is the p-value
The p-value of this sample proportion is equal to 0.0360.
At the 0.01 (1%) significance level, there isn't enough evidence to conclude that freshmen students study less than 2.5 hours per day, on an average.
How to calculate value of the test statistic?For this statistical study, we would use a t-test statistic and the null and alternative hypotheses would be given by:
H₀: p ≥ 150 minutes
H₁: p < 150 minutes
Mathematically, the t-test statistic can be calculated by using this formula:
[tex]t=\frac{x\;-\;\mu}{\frac{\delta}{\sqrt{n} } }[/tex]
Where:
x represents the sample mean.μ represents the mean.σ represents the standard deviation.n represent the number of students.Substituting the given parameters into the formula, we have;
t-test, t = (135 - 150)/(44/√30)
t-test, t = (-15)/8.0333
t-test, t = -1.8672
From the t distribution table, the p-value is given by:
p-value = P(t < -1.8672)
p-value = 0.0360
Since the p-value (0.0360) is greater than the significance level (0.01), we fail to reject the null hypothesis because there is insufficient evidence to claim that the mean time of the freshman students is less than 2.5 hours per day.
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5. If you were told that a specific tire could roll 200 yards in 27.28 revolutions, what is the radius of the tire?
The number of revolutions = Total distance divided by its circumference
The radius of the tire is 1.167 yards.
What is a circle?A circle is a two-dimensional figure with a radius and circumference of
2πr.
The area of a circle is given as πr².
We have,
The number of revolutions = Total distance divided by its circumference
Total distance = 200 yards
Revolutions = 27.28
A tire is in the form of a circle.
So,
The circumference of the tire.
= 2πr
Now,
27.28 = 200 yards / 2πr
2πr = 200 yards / 27.28
r = 200/(27.28 x 2 x 3.14)
r = 200 / 171.32
r = 1.167 yards.
The radius of the tire is 1.167 yards.
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Which relation describes a function? What makes it a function?
{(-2,3),(-3,3),(-4,3)} Each member of the domain is assigned exactly one member of the range that defines the correct relation. The correct option is D.
What is a function?The expression that established the relationship between the dependent variable and independent variable is referred to as a function. In the function as the value of the independent variable varies the value of the dependent variable also varies.
When one magnitude depends on another, the relationship between them is known as a mathematical function. So long as they are uniquely and solely connected.
Every mathematical function is the relationship between an element of group A and an element of group B. Consequently, the following algebraic expression can be used to represent this function:
Therefore, the {(-2,3),(-3,3),(-4,3)} Each member of the domain is assigned exactly one member of the range that defines the correct relation. The correct option is D.
The complete question is given below,
Which relation describes a function? What makes it a function?
A) {(-2,3),(-2,5),(-6,7)} Each member of the range is unique.
B) {(2,3),(3,3),(3,4)} Each member of the domain and range is positive.
C) {(2,3),(3,3),(3,4)} Each member of the domain and range is a real number.
D) {(-2,3),(-3,3),(-4,3)} Each member of the domain is assigned exactly one member of the range.
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Please help I was sick and missed out on class.Thank you
Roberto is applying for a mortgage. He has a monthly gross income of $3,500. The home he would like to buy has monthly payments for the following: $1,000 mortgage, $150 property taxes, $75 homeowners insurance premium, and $75 mortgage insurance premium. Roberto also has other monthly debts totaling $500 per month. Based on the Federal Housing Administration (FHA) total fixed payments-to-income ratio, would he qualify for the mortgage loan?
Based on the Federal Housing Administration's (FHA) total fixed payments-to-income ratio, Roberto would not qualify for the mortgage loan.
What is the fixed payments-to-income ratio?The Federal Housing Administration (FHA) allows 31% of a person's income to settle housing costs (as the front-end ratio) and 43% (as the back-end ratio) towards housing expenses and other long-term debt.
Monthly gross income = $3,500
Monthly payments for Housing:
Monthly mortgage = $1,000
Property taxes = $150
Homeowners insurance premium = $75
Mortgage insurance premium = $75
Total monthly housing costs = $1,300
Other monthly debts per month = $500
Total monthly payments = $1,800
Minimum front-end ratio = 31% = $1,085 ($3,500 x 31%)
Maximum back-end ratio = 43% = $1,505 ($3,500 x 43%)
Thus, using the FHA fixed payments-to-income ratio, Roberto would not qualify.
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which expressions are equivalent to 3^4/9/3^2/9? select all that apply
Answer:
first and third expressions
Step-by-step explanation:
using the rule of exponents
[tex]\frac{a^{m} }{a^{n} }[/tex] = [tex]a^{m-n}[/tex]
then
[tex]\frac{3^{\frac{4}{9} } }{3^{\frac{2}{9} } }[/tex]
= [tex]3^{\frac{4}{9}-\frac{2}{9} }[/tex] ← first expression
= [tex]3^{\frac{2}{9} }[/tex] ← third expression
You give tours on the Great Lakes and talk about points of interest.
The Great Lakes are the world's largest group of freshwater lakes by total area and second-largest by total volume.
What are the Great Lakes?The Great Lakes, also known as the Great Lakes of North America or the Laurentian Great Lakes are a series of large interconnected freshwater lakes with sea-like characteristics in North America's mid-east region that connect to the Atlantic Ocean via the Saint Lawrence River.
Superior, Michigan, Huron, Erie, and Ontario are the names of five lakes that are located on or near the Canada-United States border. Lakes Michigan and Huron are joined hydrologically at the Straits of Mackinac. The Great Lakes Waterway allows for modern water travel.
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In 2005, 10.8 out of every 50 employees at a company were women. If there are 47,093 total company employees, estimate the number of women.
The number of women at the company is ___
Answer:
10,172 women
Step-by-step explanation:
47093 / 50 = 941.86
So 941.86 lots of 50 women
941.86 x 10.8 = 10172.088 women
rounded to 10,172 women
( can't have part of a person
Perimeter of the rectangle is 136 units . Find vaule of z
4z+3. 3z+2
Stefan sells Jin a bicycle for $146 and a helmet for $19. The total cost for Jin is 150% of what Stefan spent originally to buy the bike and helmet. How much did Stefan spend originally
Answer: $110 but that may be wrong
Step-by-step explanation:
5 (a) (b) Identify the nature of two stationary points for y=4x³ - 96x² +576x.
Answer: (0,0) (12,0)
Step-by-step explanation:
y=4x³-96x²+576x
Let y=0
Hence,
4x³-96x²+576x=0
Divide both parts of the equation by 4:
x³-24x²+144x=0
x(x²-24x+144x)=0
x=0
Thus, (0,0)
x²-24x+144=0
x²-2(x)(12)+12(12)=0
x²-2(x)(12)+12²=0
(x-12)²=0
x-12=0
x=12
Thus, (12,0)
NO LINKS!! Please help me with this symmetry part 3 Select all that apply
Answer:
[tex]y=-\dfrac{1}{8}x^3[/tex]
Step-by-step explanation:
If a function is symmetrical about the origin, when y is replaced with (-y) and x is replaced with (-x), the resulting function will be equal to the original function.
Original function:
[tex]y=-\dfrac{1}{8}x^3[/tex]
Replace y with (-y) and x with (-x):
[tex]\implies -y=-\dfrac{1}{8}(-x)^3[/tex]
[tex]\implies -y=-\dfrac{1}{8}\cdot -x^3[/tex]
[tex]\implies -y=\dfrac{1}{8}x^3[/tex]
Multiply both sides by -1:
[tex]\implies y=-\dfrac{1}{8}x^3[/tex]
Therefore, as the function is equal to the original function, this function is symmetric with respect to the origin.
What do i right please help due tomorrow
Given that x(a + bx)(a − bx) = 25x - 4x³, find the value of b-ª
Answer:
[tex] {2}^{ - 5} [/tex]
Step-by-step explanation:
Please see picture on how to do it
help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Find the greatest possible error for the given measurement
350 mi
a.0.5 mi
b. 5 mi
C.17.5 mi
D 175
In a telephone poll, 36 people said they like shopping and 7 people said they do not like shopping. What is the ratio of the number of people who do not like shopping to the total number of people polled?
Answer:
7:43 or [tex]\frac{7}{43}[/tex]
Step-by-step explanation:
The total is 43 7 + 36
Answer:
7:43
Step-by-step explanation:
36+7 = 43
43 is the total amount of people that were polled
those who don't like shopping are 7, as stated in the question
the ratio is 7:43
The balance on a credit card, that charges a
28.5% APR interest rate, over a 1 month
period has a daily balance of $145. What is
the finance charge, on the average daily
balance, for this 1 month period?
28.5% = 0.285
Hint: Divide the decimal by 12 to get the monthly interest
rate. Do not round that answer. Take that answer and
multiply it to the average daily balance.
Finance charge = $[?]
Round to the nearest hundredth
The finance charge on the average daily balance for , this 1 month period is $3.45 .
In the question ,
it is given that ,
the daily balance over the period of 1 month = $145
The APR rate of interest = 28.5%
the monthly APR rate of interest = (28.5%)/12 = 2.375%
the finance charge for the 1 month period can be calculated using the formula .
finance charge = (daily average balance)×(monthly rate of interest)
Substituting the values , we get
finance charge = 145 × 2.375%
= 145 × 0.02375
= 3.44375
≈ 3.45
Therefore , The finance charge on the average daily balance for , this 1 month period is $3.45 .
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Use a compass and straight edge to create a line parallel to line AB through a point E that is not on line AB. First, draw a line from point E that crosses line AB, and label the intersection point C. Which step comes next?
- Set the compass point on A and draw an arc of any size across line .
- Move the compass point to the upper arc and mark off an arc, creating point D.
- Set the compass width to the width of the arc that crosses line .
- Place the point of the compass on C and draw an arc that crosses both lines.
Answer:
Step-by-step explanation:
The given steps describe constructing a parallel line using a compass and straightedge given line and a point E that is not on line .
Step 1: Draw a line through point E that intersects line , and label the point of intersection, C.
Step 2: Place the point of the compass on C and draw an arc that crosses both lines.
Step 3: Without adjusting the compass width, move the compass to point E and draw an arc that has a similar orientation to the first arc drawn.
Step 4: Set the compass width to where the lower arc crosses the two lines.
Step 5: Move the compass point to the upper arc on the intersection of the arc and line .
Step 6: Draw an arc so it intersects the bottom of the arc. Label the intersection D.
Step 7: Use a straightedge to connect points E and D to form the parallel line .
so the answer is Place the point of the compass on C and draw an arc that crosses both lines
The mass, m , of a lorry is 6.58 tonnes truncated to 2 decimal places. Write the error interval for m in the form a ≤ m < b .
The error interval for m is 6.58 ≤ m < 6.59
What is truncation?Truncation is a process of dropping all decimal places after a certain point without rounding the number.
Given that, the mass, m, of the lorry is 6.58 tonnes truncated to 2 decimal places.
Since the number is truncated to two decimal places, the error interval is,
6.58 ≤ m < 6.59
Hence, the error interval for m is 6.58 ≤ m < 6.59.
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what is 4 divided by 3.48
pls help
The solution to 4 divided by 3.48 is 0.87
DivisionDivision in mathematics is the method of dividing large numbers into smaller numbers or par
Step 1: Rewrite the question in mathematical terms then
[tex]\frac{3.48}{4}[/tex]= 0.87
Therefore, answer to the division is 0.87
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