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inysia [295]
3 years ago
11

The length of a shadow of a tree is 9 ft. The distance from the top of the tree to the tip of the shadow is 16 ft. what is the h

eight of the tree?
Mathematics
1 answer:
Margarita [4]3 years ago
7 0
So for this, you'll be using the pythagorean theorem to solve for the height.

9^2+b^2=16^2

Solve the exponents to get 81+b^2=256

Subtract 81 on each side to get b^2=175

Square root each side, and your answer should be b= \sqrt{175} or 13.23 ft
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A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From
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Answer:

a) z = 1.645

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Now, find  the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

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They should sample at least n small claims, in which n is found when

M = 12, \sigma = 124.88. So

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12 = 1.645*\frac{124.88}{\sqrt{n}}

12\sqrt{n} = 205.43

\sqrt{n} = \frac{205.43}{12}

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