Solve the problem.In how many ways can you answer the questions on an exam that consists of 7 multiple choice questions, each of which has 3 answer choices?
A. 3027
B. 2187
C. 1957
D. 343
Answer: B
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Solve the problem.The mode equations for a circuit follow:
What are the node voltages v1, v2, and v3?
A. v1 = 100 V, v2 = -120 V, v3 = -500 V B. v1 = 100 V, v2 = 120 V, v3 = 120 V C. v1 = 100 V, v2 = -120 V, v3 = 120 V D. v1 = 100 V, v2 = 120 V, v3 = 500 V
Express the sum or difference as a product.sin 9x - sin 3x
A. 2 sin 3x cos 6x B. 2 sin 6x cos 3x C. 2 cos 3x cos 6x D. 2 sin 3x
A piecewise function is given. Use the properties of limits to find the indicated limits, or state that the limit does not exist.f(x) = 
a. 
f(x)
b. 
f(x)
c. 
style="vertical-align: -21.0px;" />f(x) A. a. -1 b. -4 c. does not exist B. a. -1 b. -4 c. -4 C. a. -4 b. -1 c. does not exist D. a. 24 b. 24 c. 24
Factor.216y3 - 343
A. (6y - 7)(36y2 + 42y + 49) B. (216y - 7)(y2 + 42y + 49) C. (6y - 7)(36y2 + 49) D. (6y + 7)(36y2 - 42y + 49)