Answer:
c 268
Step-by-step explanation:
i did the test on the home school time for learning
5c+2(10−c) ????????
(x+8) - (X-8) ?????
The diameter of a circle is 18 centimeters. what is the radius? d=18 cm give the exact answer in simplest form.
If the width of the rectangle is three times the length and the perimeter of the rectangle is 72 ft, what are the length and width of the rectangle?
Quadratic inequalities
A 6 pound bag of grass seed covers 2,000 square feet. How many pounds would be needed to cover 25,000 square feet? Round the answer to the nearest pound.
PLEASE HELP ME!!! WORTH 10 POINTS!!!
Write the equation of the line, in point-slope form. Identify (x1, y1) as the point (1, 2). Use the box provided or the upload option to submit all of your calculations and final answer.
PLEASE HELP ME ASAP!!!
1. The average cost per ounce for glass cleaner is 7.7 cents with a standard deviation of 2.5 cents. What is the z-score of glass cleaner with a cost of 10.1 cents per ounce?
A. 0.96
B. 1.31
C. 1.94
D. 4.04
E. none of the above
2. A candy bar takes an average of 3.4 hours to move through an assembly line. If the standard deviation is 0.5 hours, what is the probability that the candy bar will take between 3 and 4 hours to move through the line?
A. .2119
B. .2295
C. .6731
D. .3270
E. .8849
3. The average noise level in a diner is 30 decibels with a standard deviation of decibels. 99% of the time, the noise level is below what value?
A. 16.04
B. 30.00
C. 36.00
D. 43.96
E. 48.00
4. The mean income per household in a certain state is $29,500 with a standard deviation of $5,750. The middle 95% of incomes is between what two values? The incomes are normally distributed.
A. $23, 750 and $35,250
B. $18,000 and $41,000
C. $29,500 and $41,000
D. $12,250 and $46,750
E. $12,325 and $81,550
Final answer:
The student's questions involve calculating z-scores and applying knowledge of normal distributions to determine probabilities and percentile ranges within a set of data. Correct answers include finding the z-score for glass cleaner costs, determining the probability of assembly line time for a candy bar, identifying the noise level not exceeded 99% of the time in a diner, and calculating the income range for the middle 95% in a state.
Explanation:
To solve these problems related to standard normal distribution and probabilities, we'll follow a step-by-step process. For each question, you'll either need to calculate a z-score or apply knowledge of normal distributions.
The z-score for a glass cleaner costing 10.1 cents per ounce when the mean cost is 7.7 cents and the standard deviation is 2.5 cents is calculated as: z = (10.1 - 7.7) / 2.5 = 0.96. The correct answer is A.The probability of a candy bar taking between 3 and 4 hours through the assembly line involves finding the area under the normal curve between these two z-scores: z for 3 hours and z for 4 hours. Use z-tables or calculators to find P(3 < X < 4) = P(Z < (4 - 3.4) / 0.5) - P(Z < (3 - 3.4) / 0.5) which gives us C. 0.6731.To find the noise level that is not exceeded 99% of the time, use the z-score that corresponds to 99% in the standard normal distribution and multiply by the standard deviation and add to the mean. This gives us 43.96 decibels, with D being the correct answer.The middle 95% of normally distributed incomes is found using z-scores that correspond to the 2.5th percentile and 97.5th percentile because 95% is in between. The correct answer is A. $18,000 and $41,000.HELPS ASAP PLEASE!!!!
Find the product of -9 and -3.
A. 27
B. -27
C. 3
D. -3
for lunch , you must choose a sandwich, a piece of fruit, and a drink. your choices include a ham sandwich, tuna sandwich, or cheese sandwich; an apple or an orange; and skim milk, whole milk, fruit juice, or bottle water. how many combinations of choices are possible
If a student scores a 17/35 on a test, what is their percentage on it?
Suppose you're given the formula R = s + 2t. If you know that s is three times greater than t, how could you rewrite the formula?
A. R=3 (s+t)
B. R=5s
C. R=5t
D.R=3(s+2r)
Answer:the answer is C
Step-by-step explanation:
You are dealt one card from a 52-card deck. find the probability that you are not dealt: a heart.
How many people lost their jobs when minimum wage increased from $12 to $18?
Answer:
15 people lost their jobs when minimum wage increased from $12 to $18
Step-by-step explanation:
When the minimum wage is $12
Then by looking at the given graph :
Number of labors supplied = 33
Number of labors in demand = 33
So, it is an equilibrium wage for the system.
Now, when the minimum wage increased from $12 to $18
From the given graph :
Number of labors supplied = 45
Number of labors in demand = 18
⇒ Number of labors working when wage is $12 = 33
And when the wage is $18, no. of labors working or are in demand = 18
⇒ Number of workers who lost their job = 33 - 18 = 15
Hence, 15 people lost their jobs when minimum wage increased from $12 to $18
Megan is starting a business selling cookies. She researched other businesses to determine the price that people are willing to pay for a dozen cookies her results can be represented by the equation n=-2p+16 where P is the price per dozen cookies and N is the number of dozens sold where does the graph of the equation cross the x-axis?
what are the zeros of f(x)=x^2+7x+5
Find the volume of a cube that will hold sixty-four 4.19 in3 toy bouncy balls. (round to nearest whole number)
we know that
The volume of the ball (sphere) is equal to
[tex]V=\frac{4}{3} \pi r^{3}[/tex]
In this problem we have
[tex]V=4.19\ in^{3}[/tex]
Find the radius of the sphere
[tex]r=\sqrt[3]{\frac{3V}{4\pi}}[/tex]
Substitute the value of V
[tex]r=\sqrt[3]{\frac{3*4.19}{4\pi}}=1\ in[/tex]
for the calculation of the total volume I will assume that each ball is a cube
The volume of each ball is
[tex]V=b^{3}[/tex]
where
b is the diameter of the ball
[tex]b=1*2=2\ in[/tex]
Substitute
[tex]V=2^{3}=8\ in^{3}[/tex] ------> volume of each ball in the shape of cube
so
Multiply by [tex]64[/tex]
[tex]64*8=512\ in^{3}[/tex]
therefore
the answer is
[tex]512\ in^{3}[/tex]
I really need help doing this spelling plz answer really Quick
A. Matching Definitions:
1 small whirls - eddies
2. snake teeth - fangs
3. rattlesnakes - rattles
4. defeats; failures - losses
5. freedoms - liberties
6. skills; talents - abilities
7. bunches or groups - batches
8. eyelid hairs - lashes
9. nations - countries
10. accepted truths - beliefs
How to perform the completing sentences11. The cook put potatoes and carrots in the stew.
12. Are crocodiles and alligators reptiles?
13. Many rodeos have riding and roping events.
14. The travelers were happy in their new surroundings.
15. Our taxes will be used to build new schools.
16. The numeral 100 has two zeroes.
17. He searched the paper for job opportunities.
18. You can use an ax to put notches in a log.
19. The clever criminal had many different identities.
20. Pioneers faced many difficulties in the wilderness.
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find the product of (a²+b)(2a²-5b)
A shop advertised a 27% off sale. If a coat originally sold for 253 , find the decrease in price and the sale price
Samantha is planting a garden in her backyard that is going to be 600 square inches. She loves tomatoes and wants them to cover 60% of the garden. She then put lettuce in 1/3 of what was left. The remaining part of her garden was used for fresh herbs. What is the area of the garden that is fresh herbs?
Which of the following is the quadratic parent function
Answer:
A. F(x)=x^2
Step-by-step explanation:
Answer: Option A F(x)=[tex]x^{2}[/tex]
Explanation:
Quadratic function is the function which has degree two
Degree is the highest power of a polynomial
In option B we have |x| in which degree is one hence, discarded
In option C we have [tex]x^{3}[/tex] in which degree is three hence, discarded
In option D we have x which is a linear function being of degree one. Hence, discarded.
Which one f the following would appear in the credits column of a bank statement for a checking account?
A. Bank fees
B. An ATM withdrawal
C. An online bill payment
D. A direct deposit
The direct deposit would appear in the credit's column of a bank statement for a checking account option (D) is correct.
What is direct deposit?A direct deposit by a payer into a payee's bank account is referred to as a direct deposit. Businesses most usually use direct deposits to pay salaries and wages, and they are typically made through electronic funds transfers or physical deposits into a payee's bank account.
From the definition, the direct deposit is the amount which is deposited by the individual bank accounts.
A direct deposit would appear in the credit's column of a bank statement for a checking account.
Thus, the direct deposit would appear in the credit's column of a bank statement for a checking account option (D) is correct.
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Answer: A direct deposit
Step-by-step explanation:
How to know if a line is parallel perpendicular or neither?
Write an algebraic expression for the phrase. 8 times the quantity d minus 3 8d – 3 8(d – 3) d(8 – 3)
What is 12.1167 rounded to the nearest hundredth?
What is 4.14 trillion in scientific notation?
The given data can be written in scientific notation as 4.14 × 10¹².
How to write a number in scientific notation?In order to write a number in scientific notation, express the number in terms of the product of a number between 0 to 10 and the power of 10.
For example, 32 can be written as 3.2 × 10¹.
Here, 3.2 is between 0 and 10 and the power of 10 is 1
The given data is 4.14 trillion.
Since, one trillion can be written as,
1 trillion = 1,000,000,000,000
The number of zeros is 12.
In the scientific notation 4.14 trillion can be written as below,
4.14 × 10¹²
Hence, the scientific notation of the given data is 4.14 × 10¹².
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The Smith family rented a recreational vehicle for a seven-day vacation. The cost to rent the recreational vehicle was $560 plus $0.50 per mile. How many miles were driven if the total cost was $1350?
The Smith family drove 1580 miles during their seven-day vacation in the rented recreational vehicle, calculated by subtracting the flat rental fee from the total cost, and then dividing by the cost per mile.
Explanation:This question centers on simple algebra. To calculate the number of miles driven, you need to first understand that the total cost consists of a flat rental fee and the cost per mile driven. First, we take the total cost, $1350, and subtract the flat fee of $560 from it. This leaves us with $790.
We then divide that $790 by the price per mile, which is $0.50. The calculation would then be as follows: $790 ÷ $0.50 = 1580 miles. Therefore, the Smith family drove 1580 miles during their seven-day vacation in the recreational vehicle.
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Find the real roots of the equation x^4-5x^2-36=0
Which function below is the inverse of f(x) = the quantity of two x plus three, over five.?f−1(x) = the quantity of five x plus three, over twof−1(x) = the quantity of five x minus three, over twof−1(x) = five over the quantity of two x plus threef−1(x) = five over the quantity of three minus two x?
Answer:
[tex]f^{-1}(x)=\dfrac{5x-3}{2}[/tex]
f⁻¹(x) = the quantity of five x minus three, over two
C is correct
Step-by-step explanation:
Given: [tex]f(x)=\dfrac{2x+3}{5}[/tex]
We need to find inverse of function f(x)
Step 1: Set f(x)=y
[tex]y=\dfrac{2x+3}{5}[/tex]
Step 2: Switch x and y
[tex]x=\dfrac{2y+3}{5}[/tex]
Step 3: Solve for y (isolate y)
[tex]5x=2y+3[/tex]
[tex]2y=5x-3[/tex]
[tex]y=\dfrac{5x-3}{2}[/tex]
Therefore, [tex]f^{-1}(x)=\dfrac{5x-3}{2}[/tex]
Now we write as sentence form,
Inverse of f(x) is 5 times of x minus 3 over 2.
Hence, f⁻¹(x) = the quantity of five x minus three, over two
The typical flight of stairs has 12 steps. Billy is on a new fitness regimen that requires him to climb at least 300 steps each day. His fitness tracker says he has already climbed 175 steps.
Let n represent the number of flights of stairs Billy has yet to climb.
Create the inequality that symbolizes this situation.
Then answer this.
If Billy climbs 10 more flights of stairs, will he meet his required 300 steps?