3 years ago

How many meters does a runner cross in a circular runway with radious of 100 meters [R=3, 14]

1 answer:

kogti [31]3 years ago

3 0

Diameter = 2 * radius = 200m

circumference (length of the outside of the circle = diameter * pi = 200 * 3.14

= 628m

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Aliun [14]

C = 2 pi r
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3 years ago

mamaluj [8]

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356

Step-by-step explanation:

We are given that p=0.7, and a 90% confidence interval. Also, we know the margin of error to be 0.04, the sample size is calculated as:

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$ME=z_{\alpha/2}\sqrt\frac{p(1-p)}{n}}\\\\0.04=1.645\sqrt\frac{0.7(1-0.7)}{n}\\\\n=\frac{0.7\times 0.3}{(0.04/1.645)^2}\\\\n=355.17\approx 356$

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3 years ago

ladessa [460]

I think it’s c sorry if I’m wrong

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3 years ago

How many meters does a runner cross in a circular runway with radious of 100 meters [R=3, 14]​