Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.(9x1/5 ? y1/5)2

A. 81x2/5y2/5
B. 81x1/25y1/25
C. 81x2y2
D. 81x1/10y1/10


Answer: A

Mathematics

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A. 7 km/hr
B.  km/hr
C.  km/hr
D. 15 km/hr

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A. -1 B. 1 C. 1 - i D. 1 + i

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Find the average rate of change of the function as x changes from a to b.f(x) = -x3; a = -1, b = 5

A. 21 B. -29 C. -21 D. 31

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