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tatuchka [14]
2 years ago
6

The mean price of computers sold at a particular store is $949 with a standard deviation of $75. The z-score of a certain comput

er is -0.8. What is the price of the computer?
Advanced Placement (AP)
1 answer:
Arisa [49]2 years ago
5 0

Answer:

the price of the computer is $889

Explanation:

The computation of the price of the computer is shown below:

As we know that

Z-score = (x-mean) ÷ standard deviation

-0.8 = (x - 949) ÷ 75

x = -0.8 × 75  + 949

= -60 + 949

= $889

Hence, the price of the computer is $889

We simply applied the above formula so that the correct value could come

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Answer: The answer is: f(x) = 2x^2 + 40x + 200

Explanation:

Given: x is the width of the Artwork

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Let L be the Length of the Frame

Width = x + 10

Length = Width * 2, so by substitution, Length = 2(x + 10)

Area = Width * Length

By substitution:

Area = (x + 10) * 2(x + 10)

f(x) = (x + 10) * (2x + 20)

f(x) = 2x^2 + 20x + 20x + 200

f(x) = 2x^2 + 40x + 200

To test this, if a picture 8" wide is put in this frame, the width would be 8+10 or 18 inches. The length would be twice the width, or 36 inches. The Area is 18 x 36 = 648.

Using the formula:

f(8) = (2 * 8^2) + (40 * 8) + 200

f(8) = (2 * 64) + 320 + 200

f(8) = 128 + 320 + 200

f(8) = 648

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