Simplify the expression. Assume that all variables are positive.
? 
A. 
B. 30
C. 225
D. 15
Answer: D
Mathematics
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Find the square.(w - 14)2
A. w2 + 196 B. w2 - 28w + 196 C. w + 196 D. 196w2 - 28w + 196
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Graph the pair of parametric equations with the aid of a graphing calculator.x = 5 tan t, y = 3 sec t; -?/2 ? t ? ?/2 
A. 
B. 
C. 
D. 
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Solve.The product of negative three and a number is forty-eight. What is the number?
A. 16 B. -16 C. 51 D. 3
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Solve the problem.A stone is thrown into a pond. A circular ripple is spreading over the pond in such a way that the radius is increasing at the rate of 2.3 feet per second. Find a function, r(t), for the radius in terms of t. Find a function, A(r), for the area of the ripple in terms of r. 
A. (A ? r)(t) = 5.29?t2 B. (A ? r)(t) = 4.6?t2 C. (A ? r)(t) = 2.3?t2 D. (A ? r)(t) = 5.29?2t
Mathematics