3 years ago

At a point on the ground 50 feet from the foot of

Mathematics

1 answer:

Likurg_2 [28]3 years ago

5 0

Answer:

$\tan(53) = \frac{x}{50} \\ x = \tan(53) \times 50 \\ x = 66.35 \: feet$

Step-by-step explanation:

I hope that is useful for you :)

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Answer:

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Step-by-step explanation:

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What is the slope and y-intercept of this equation?

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

A random sample of 18 fields of barley has a mean yield of 36.4 bushels per acre and standard deviation of 7.37 bushels per acre

dexar [7]

Answer:

So, the confidence interval is [34.08, 38.72].

Step-by-step explanation:

We know that a random sample of 18 fields of barley has a mean yield of 36.4 bushels per acre and standard deviation of 7.37 bushels per acre.

We have :

$n=18\\\\\mu=36.4\\\\\sigma=7.37\\\\c=80\%$

We use the Appendix: Critical Values Tables, and we get that:

$t_{\frac{\alpha}{2}}=1.333$

We calculate the margin of error:

$E=t_{\frac{\alpha}{2}}\cdot \frac{\sigma}{\sqrt{n}}=1.333\cdot \frac{7.37}{\sqrt{18}}=2.32$

We get the boundaries of the confidence interval:

$\mu-E=36.4-2.32=34.08\\\\\mu+E=36.4+2.32=38.72\\$

So, the confidence interval is [34.08, 38.72].

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4 years ago