3 years ago

Which side lengths form a right triangle?

Mathematics

1 answer:

Elanso [62]3 years ago

3 0

It has to be 30,40,50

Due to Pythagoras Theron it suggests that longer sides is a*2 and b*2 and 30 and 40 square is 2500

2500 square is 50 meaning it makes this statement true

All others are wrong

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Step-by-step explanation:

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3 years ago

It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken to estimate

Hitman42 [59]

Answer:

The minimum sample size is n = 75 so that the desired margin of error is 5 or less.

Step-by-step explanation:

We are given the following in the question:

Population variance = 484

Standard deviation =

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Significance level = 0.05

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Formula:

Margin of error =

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$E\leq 5\\\\1.96\times \dfrac{22}{\sqrt{n}} \leq 5\\\\\sqrt{n} \geq 1.96\times \dfrac{22}{5}\\\\n \geq (1.96\times \dfrac{22}{5})^2\\\\n \geq 74.373$

Thus, the minimum sample size is n = 75 so that the desired margin of error is 5 or less.

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Step-by-step explanation:

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