Factor. Assume that all exponents are positive.a2n - b2

A. (an + b)(an - b)
B. (an + b)(n - b)
C. 2(a - b)(a + b)
D. (an - b)2

Answer: A

Mathematics

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A. 50 m B. 111.8 m C. 7.1 m D. 86.6 m

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Use the given information to find the exact value of the trigonometric function.csc ? = - , tan ? > 0Find cos .

A.
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