The expected value of the following probability distribution is ______.

1
5
10
20
50

0.30
0.40
0.10
0.15
0.05

A. 17.5
B. 8.8
C. 7.5
D. 6.4

Answer: B

Mathematics

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Even with most of the problem missing, it is possible to tell whether a suggested answer is reasonable. Determine whether the answer given is reasonable. If it is unreasonable, move the decimal point or insert a decimal point to make the answer reasonable.What was the price of the book?$22

A. Unreasonable, should be $220
B.

Reasonable

C. Unreasonable, should be $2200
D. Unreasonable, should be $2.20

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Mathematics

Write the fraction as a decimal.

A. 0.8 B. 0.6 C. 0.75 D. 0.4

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Mathematics

Use a calculator to find an approximate solution to the equation. Round your answer to the nearest thousandth.4x2 + 10x = - 2

A. {-0.219, -2.281} B. {-0.11, -1.14} C. {0.186, -2.686} D. {-1.469, -3.531}

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Mathematics

Find an equation for the conic whose graph is shown.

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Mathematics