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3 years ago

Circle P has a circumference of approximately 75 inches.

Mathematics

1 answer:

rosijanka [135]3 years ago

7 0

I’d say 12 but i could be wrong

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What is the percentage that snow will fall tomorrow in washington.

Reika [66]

Answer:

You will have a 30-40% chance of rain, not snow. ( so 0% )

Step-by-step explanation:

I just looked at the weather report for Washington

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2 years ago

A miner descended 1400 feet into a mine from the mine's entrance. While in the mine, he then rose 800 feet and then descended 45

postnew [5]

The correct answer is A.-1050

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3 years ago

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"A cable TV company wants to estimate the percentage of cable boxes in use during an evening hour. An approximation is 20 percen

Marizza181 [45]

Answer:

The company should take a sample of 148 boxes.

Step-by-step explanation:

Hello!

The cable TV company whats to know what sample size to take to estimate the proportion/percentage of cable boxes in use during an evening hour.

They estimated a "pilot" proportion of p'=0.20

And using a 90% confidence level the CI should have a margin of error of 2% (0.02).

The CI for the population proportion is made using an approximation of the standard normal distribution, and its structure is "point estimation" ± "margin of error"

[p' ± $Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$ ]

Where

p' is the sample proportion/point estimator of the population proportion

$Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$ is the margin of error (d) of the confidence interval.

$Z_{1-\alpha /2} = Z_{1-0.05} = Z_{0.95}= 1.648$

$d= Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$

$d *Z_{1-\alpha /2}= \sqrt{\frac{p'(1-p')}{n} }$

$(d*Z_{1-\alpha /2})^2= \frac{p'(1-p')}{n}$

$n*(d*Z_{1-\alpha /2})^2= p'(1-p')$

$n= \frac{p'(1-p')}{(d*Z_{1-\alpha /2})^2}$

$n= \frac{0.2(1-0.2)}{(0.02*1.648)^2}$

n= 147.28 ≅ 148 boxes.

I hope it helps!

3 0

3 years ago

Solve equation: 15=2y - 5(quickly please)

andrew11 [14]

15+5=2y-5+5

=20 = 2y

20/2 = 2y/2

10 = y

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3 years ago

This is a easy question, but what is the easiest way you could solve for slope? <br> :) ty

Cloud [144]

Seeing where the x and y diffreant on the line :)

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3 years ago

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