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4 years ago

This is the second part to my last math questions.

Mathematics

1 answer:

alina1380 [7]4 years ago

3 0

4th root of x^5
x^5 = x(x^4)
= x times 4th root x
last solution

the 5th root to the 5th power cancels out leaving -243

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Marco drove 75 miles in 1 2/3 hours. How many miles can he drive in 1 hour? (SHOW WORK)

love history [14]

Answer:

45 miles

Step-by-step explanation:

Marco's average speed is ...

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Marco's rate of travel is 45 miles in one hour.

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4 years ago

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6% sales tax on a pair of jeans selling for $19.99. What is the total cost? Round to the nearest tenth

lidiya [134]

To get 1% of $19.99 we can move the decimal place two spots to the left. This leaves us with .2 rounded. Then multiply .2 x 6 because its a 6% sales tax. This gives an answer of $1.2. The sales tax on the pair of jeans is an additional $1.20.

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3 years ago

The heights of women aged 20 – 29 in the United States are approximately Normal with mean 64.2 inches and standard deviation 2.8

Alenkinab [10]

Answer:

a) 0.64

b) -1.13

Step-by-step explanation:

We are given the following information in the question:

Women:

Mean, μ = 64.2 inches

Standard Deviation, σ = 2.8 inches

We are given that the distribution of heights of women is a bell shaped distribution that is a normal distribution.

Men:

Mean, μ = 69.4 inches

Standard Deviation, σ = 3.0 inches

We are given that the distribution of heights of men is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

5.5 feet = 66 inches

a) z‑score for a woman 5.5 feet tall

$x = 66\\\\\Rightqrrow z = \displaystyle\frac{66 - 64.2}{2.8} = 0.64$

b) z‑score for a man 5.5 feet tall

$x = 66\\\\\Rightqrrow z = \displaystyle\frac{66 - 69.4}{3.0} = -1.13$

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3 years ago

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Tanzania [10]

I hope this helps you

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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