Simplify the expression. Write the answer with only positive exponents. Assume that all variables represent positive real numbers.

A.
B. -7b13/4
C. -7b15/4
D.

Answer: B

Mathematics

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Rationalize the denominator.

A.
B.
C.
D.

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Express the number in scientific notation.4,0,000,000,000

A. 4 × 109 B. 4 × 1012 C. 4 × 10-9 D. 4 × 10-12

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Identify the numerical coefficient of the term.-v

A. 1 B. v C. 0 D. -1

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Use a calculator to find the function value to four decimal places.cos (-624°)

A. -0.1045 B. 0.4067 C. 0.9945 D. -0.5878

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Mathematics