3 years ago

Which equation represents a line which is perpendicular to the line y=5/4x-4

Mathematics

1 answer:

erastovalidia [21]3 years ago

8 0

Answer:

Step-by-step explanation:

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Among 320 randomly selected airline travelers, the mean number of hours spent travelling per year is 24 hours and the standard d

Ostrovityanka [42]

The margin of error of the random selection is 0.29

The given parameters are:

$n = 320$ --- the sample size

$\sigma = 2.9$ --- the standard deviation

$\bar x = 24$ --- the mean

$\alpha = 90\%$ --- the confidence level.

The margin of error (E) is calculated as follows:

$E = z \times \sqrt{\frac{\sigma^2}{n}}$

So, we have:

$E = z \times \sqrt{\frac{3.2^2}{320}}$

$E = z \times \sqrt{\frac{10.24}{320}}$

The z-value for 90% confidence level is 1.645.

Substitute 1.645 for z

$E = 1.645 \times \sqrt{\frac{10.24}{320}}$

$E = 1.645 \times \sqrt{0.032}$

Take square roots

$E = 1.645 \times 0.1789$

Multiply

$E = 0.2943$

Approximate

$E = 0.29$

Hence, the margin of error is 0.29

Read more about margin of error at:

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What is the area of the irregular polygon QUART?

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The area of QUART is 66

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The table represents the monthly fees for checking accounts at two banks. Bank Monthly fee L 1% of checking account balance Р S6

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3/5 of the 30 students are boys how many students are girls

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if 3/5 are boys

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