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jenyasd209 [6]
4 years ago
15

Jeremy uses 27 inches of board for each birdhouse he builds. How many yards of board does he need to make 6 birdhouses?

Mathematics
1 answer:
Blababa [14]4 years ago
7 0

Answer:

4.5\ yd

Step-by-step explanation:

step 1

we know that

Jeremy uses 27 inches of board for each birdhouse

so

by proportion

Calculate how  many inches of board does he need to make 6 birdhouses

\frac{27}{1}\frac{in}{birdhouses}=\frac{x}{6}\frac{in}{birdhouses} \\ \\x=6*27\\ \\x=162\ in

step 2

Convert inches to yards

1\ yd =36\ in

162\ in=162/36=4.5\ yd

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A study of peach trees found that the average number of peaches per tree was 725. The standard deviation of the population is 70
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Answer:

She needs to sample 189 trees.

Step-by-step explanation:

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She needs to sample n trees.

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10 = 1.96\frac{70}{\sqrt{n}}

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explanation

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