3 years ago

Evaluate the function

Mathematics

1 answer:

fenix001 [56]3 years ago

8 0

Answer:

-36

Step-by-step explanation:

use the given functions to set up the equation, and simplify it.

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Warren spends 117 minutes ( 1 hour, 57 minutes) exercising over the weekend.

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3 years ago

lys-0071 [83]

Answer:

The number of quarters Josie has in her collection of 92 coins 28 quarters

Step-by-step explanation:

The given information are

The total number of coins Josie has = 92

Let the number of quarters she has = x

Therefore, 92 = 8 + 3×x

8 + 3×x = 92

3×x = 92 - 8 = 84

3×x = 84

x = 84/3 = 28

x = 28

The number of quarters Josie has in her collection of 92 coins = 28 quarters.

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3 years ago

The life of light bulbs is distributed normally. the standard deviation of the lifetime is 25 hours and the mean lifetime of a b

Dominik [7]

The probability is 0.8997.

We will use a z-score to answer this question. z-scores are given by the formula
$z=\frac{X-\mu}{\sigma}$

With our information, we have
$z=\frac{622-590}{25}=\frac{32}{25}=1.28$

Looking this up in a z-table (http://www.z-table.com) we see that the area to the left of this (everything less than, up to this value) is 0.8997.

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3 years ago