Multiply and simplify. Assume that all variables represent positive real numbers. ? 

A. 3xy2
B. 9y2
C. 9xy4
D. 9xy2

Answer: D

Mathematics

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Solve the problem.Weights of adult females in a certain country are normally distributed with a mean of 136 lb and a standard deviation of 15 lb. A weight of 115 lb represents what percentile? Round the percentile to the nearest tenth.

A. 9.7 B. -1.4 C. 8.1 D. 2.2

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Use a calculator to find the value of y in degrees rounded to two decimal places.y = cot-1 5.424

A. -10.45° B. 10.45° C. 10.62° D. 79.37°

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Mathematics

Complete the comparative income statement. Round percents to the nearest tenth of a percent.

What will be an ideal response?

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Mathematics

Choose the best estimate for the sum or difference.15 - 1

A. 13 B. 14 C. 20 D. 15

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Mathematics