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2 years ago

Help me for brainlist

Mathematics

1 answer:

igor_vitrenko [27]2 years ago

5 0

Answer:

1. g. $0.10 per square inch

2. c. $0.08 per square inch

3. f. $10

4. m. $8

5. h. 79 in²

6. j. 113 in²

Step-by-step explanation:

1. A = πr²

r = diameter ÷ 2 = 10 ÷ 2 = 5

A = π(5)² = 25π in² ≈ 78.53981

$8.00/25π = $0.10 per square inch

2. A = πr²

r = diameter ÷ 2 = 12 ÷ 2 = 6

A = π(6)² = 36π in² ≈ 113.0973355

$10.00/36π = 0.088419 = $0.08 per square inch

3. information/answer was provided

4. information/answer was provided

5. A = πr²

r = diameter ÷ 2 = 10 ÷ 2 = 5

A = π(5)² = 25π in² ≈ 79 in²

6. A = πr²

r = diameter ÷ 2 = 12 ÷ 2 = 6

A = π(6)² = 36π in² ≈ 113 in²

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Find the equation of the line that passes through the pair of points. (-5,3) (-5,0)

sladkih [1.3K]

Answer:

x = -5

Step-by-step explanation:

Note that x does not change. Hence, this line is a vertical one, and its slope is undefined. The line is defined by the equation x = -5.

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3 years ago

Barron's reported that the average number of weeks an individual is unemployed is 17.5 weeks. Assume that for the population of

Olin [163]

Answer:

$P(16.5$

And using the normal standard table or excel we find the probability:

$P(-1.768< Z< 1.768) = P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

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Solution to the problem

Let X the random variable that represent the avergae number of weeks an individual is unemployed of a population, and for this case we know the distribution for X is given by:

$X \sim N(17.5,4)$

Where $\mu=17.5$ and $\sigma=4$

Since the distribution for X is normal then, the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu= 17.5, \frac{\sigma}{\sqrt{n}}= \frac{4}{\sqrt{50}}=0.566)$

We select a sample of n =50 people. And we want to find the following probability

$P(16.5$

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3 years ago

Solve for n -3n-5=16

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Answer:

n = -7

Step-by-step explanation:

Solve for n:

-3 n - 5 = 16

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Add 5 to both sides:

(5 - 5) - 3 n = 5 + 16

Hint: | Look for the difference of two identical terms.

5 - 5 = 0:

-3 n = 16 + 5

Hint: | Evaluate 16 + 5.

16 + 5 = 21:

-3 n = 21

Hint: | Divide both sides by a constant to simplify the equation.

Divide both sides of -3 n = 21 by -3:

(-3 n)/(-3) = 21/(-3)

Hint: | Any nonzero number divided by itself is one.

(-3)/(-3) = 1:

n = 21/(-3)

Hint: | Reduce 21/(-3) to lowest terms. Start by finding the GCD of 21 and -3.

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