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2 years ago

What is the radius of the diameter of a circle that is 14 inches?

Mathematics

1 answer:

Vladimir79 [104]2 years ago

6 0

Diameter: The length of the circle

Radius: Half of the diameter

If the diameter of the circle is 14 inches, the radius would be 7 inches as the radius is half the diameter

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I need help with this question. I didn't choose answer D, but I accidentally did. If you could help me, that would be great.

Alex

Answer:

The correct answer would be B

Step-by-step explanation:

Plz Mark Brainlist

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3 years ago

What is the measure of angle AOB?

Anettt [7]

Answer:

let angle AOB and angle COD be x

the it would be

x+x+110=180

2x+110=180

2x=180-110

2x=70

x=70/2

x=35 degree.

hope it will help you.

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3 years ago

Help Please!! I WILL give brainliest and thanks!!

Tcecarenko [31]

Answer:

ez pts tysm

Step-by-step explanation:

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2 years ago

"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

What is measure of angle R?

Tema [17]

I think you need to add them all up first or do the 90 degree

8 0

3 years ago