Evaluate. Assume that all variables represent positive numbers. 
A. 1
B. -15
C. 15
D. -1
Answer: C
Mathematics
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Find the length of the curve.The spiral r = 5?2, 0 ? ? ? 2
A. 
B. 80?5
C. 
((?2 + 1)3/2 - 1)
D. 720
Mathematics
Add or subtract as indicated. Make sure that your answer is reasonable by estimating first.9.960 + 5.092
A. 4.868 B. 15.052 C. -4.868 D. 16.052
Mathematics
Determine the possible number of positive real zeros and negative real zeros of the polynomial function using Descartes' rule of signs.f(x) = -4x7 - 9x6 - 4.5x5 + 3x4 + x + 18
A. 1 positive zero, 4 or 2 negative zeros B. 1 positive zero, 3 or 1 negative zeros C. 1 positive zero, 4, 3 or 1 negative zeros D. 1 positive zero, 2 or 0 negative zeros
Mathematics
Divide, if possible. Assume any variable in the denominator is nonzero.
A. 16 B. 0 C. Undefined D. 1
Mathematics