If possible, simplify the expression. If any variables exist, assume that they are positive.
- 
A. - 3
B. - 3
C. -4.5
D. -9
Answer: D
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Evaluate the expression without using a calculator. 128(-1/7)
A. -2
B. 128
C. -128
D. 
E. 
Find y '.y = (5x3 + 9)(5x7 - 8)
A. 250x9 + 315x6 - 120x B. 20x9 + 315x6 - 120x2 C. 250x9 + 315x6 - 120x2 D. 20x9 + 315x6 - 120x
Solve the problem.The base of the closed cubelike surface is the unit square in the xy-plane. The four sides lie in the planes x = 0, x = 1, y = 0, and y = 1. The top is an arbitrary smooth surface whose identity is unknown. Let 
and suppose the outward flux through the side parallel to the yz-plane is 3 and through the side parallel to the xz-plane is -5. What is the outward flux through the top?
A. -2 B. 0 C. 2 D. Not enough information to determine
Solve.An electrical circuit has a resistance of 3 ohms and a current of -7 amps. Find the voltage.
A. -10 V B. 21 V C. -21 V D. -22 V