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Anettt [7]
2 years ago
8

A stack of 4 bricks is 6 feet high how high is a stack of 20 bricks

Mathematics
1 answer:
artcher [175]2 years ago
5 0
Hello there!

We first would have to determine how many feet are in each brick of the 4 bricks.

(6/4)= 1.5

There are 1.5 for ever brick.

Now that we know this, we do 1.5 by how many bricks we would want to multiply by, which in this case is 20.

(1.5x20) = 30 ft.

Your correct answer would be . . . 30 ft tall.

I hope this helps you!
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The temperature of coffee served at a restaurant is normally distributed with an average temperature of 160 degrees Fahrenheit a
posledela

Answer:

The 20th percentile of coffee temperature is 155.4532 degrees Fahrenheit.  

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 160 degrees

Standard Deviation, σ = 5.4 degrees

We are given that the distribution of temperature of coffee is a bell shaped distribution that is a normal distribution.

Formula:

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

We have to find the value of x such that the probability is 0.2

P( X < x) = P( z < \displaystyle\frac{x - 160}{5.4})=0.2  

Calculation the value from standard normal z table, we have,  

\displaystyle\frac{x - 160}{5.4} = -0.842\\\\x = 155.4532  

Thus,

P_{20}=155.4532

The 20th percentile of coffee temperature is 155.4532 degrees Fahrenheit.

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Step-by-step explanation:

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3 years ago
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