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3 years ago

What will this problem look like? The radius, r, of a circle is one-half of the length of its diameter, d.

Mathematics

2 answers:

Zina [86]3 years ago

5 0

R = 1/2d

r = d/2.......d/2 is the same as 1/2d

2r = d

aniked [119]3 years ago

3 0

2. 2r=d
4. r= 1/2d
5. r= d/2

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How would u solve 7c + 12 = -4c + 78

zheka24 [161]

7c + 12 = -4c + 78 +4c. +4c 11c + 12 = 78 -12. -12 11c = 66 11/11. 66/11 C = 6 Plug in the answer to check . 7 * 6 + 12 = 54 -4 * 6 + 78 = 54 54 = 54

4 0

4 years ago

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the

Vesna [10]

Answer:

A sample size of at least 1,353,733 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

98% confidence level

So $\alpha = 0.02$ , z is the value of Z that has a pvalue of $1 - \frac{0.02}{2} = 0.99$ , so $Z = 2.327$ .

You would like to be 98% confident that you esimate is within 0.1% of the true population proportion. How large of a sample size is required?

We need a sample size of at least n.

n is found when M = 0.001.

Since we don't have an estimate for the proportion, we use the worst case scenario, that is $\pi = 0.5$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.001 = 2.327\sqrt{\frac{0.5*0.5}{n}}$

$0.001\sqrt{n} = 2.327*0.5$

$\sqrt{n} = \frac{2.327*0.5}{0.001}$

$(\sqrt{n})^{2} = (\frac{2.327*0.5}{0.001})^{2}$

$n = 1353732.25$

Rounding up

A sample size of at least 1,353,733 is required.

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3 years ago

What is the area of sector GPH? Radius= 9 yards... 40 degrees

Shalnov [3]

28 yards^2..................................

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3 years ago

Twice the sum of a number and 9 is equal to 6

jenyasd209 [6]

2(n+9)=6 divide both sides by 2

n+9=3 subtract 9 from both sides

n=-6

check

2(-6+9)=6

2(3)=6

6=6

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3 years ago

News reports from the western United States occasionally report incidents of cattle ranchers slaughtering many newborn calves an

rjkz [21]

If the selling price is not sufficient to cover the variable cost of sending the calves to market this behavior makes economic sense
Brainliest? Hope this helps:)

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3 years ago