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2 years ago

Need help?!?!?!?!?!?

Mathematics

1 answer:

drek231 [11]2 years ago

3 0

Answer:

1) b = 7.4 yds

2) c = 14.9 yds

Step-by-step explanation:

1) 3^2 + b^2 = 8^2

9 + b^2 = 64

b^2 = 64 - 9

b = sqrt 55

b = 7.4 yd

2) 15^2 + 2^2 = c^2

225+4=c^2

Sqrt(221) = c

C = 14.9

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Width is twice the margin of error, so a margin of error of 2 would be need. To solve this, we have to consider the population standard deviation as $\sigma = 6.2$ , and then use the z-distribution.