Use identities to rewrite the following expression as sin ?, cos ?, tan ?, csc ?, sec ?, or cot ?.
A. sin ?
B. tan ?
C. csc ?
D. cot ?
Answer: C
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Find the average value of the function over the given interval.f(x) = 2x + 12 on [-6, 6]
A. 144 B. 12 C. 24 D. 6
Solve the problem.A power plant is located on a river that is 700 feet wide. To lay a new cable from the plant to a location in a city 1 mile downstream on the opposite side costs $175 per foot across the river and $150 per foot along the land. Suppose that the cable goes from the plant to a point Q on the opposite side that is x feet from the point P directly opposite the plant. Write a function C(x) that gives the cost of laying the cable in terms of the 
A. C(x) = 150
+ 175(5280 - x)
B. C(x) = 175(700 - x) + 150(1 - x)
C. C(x) = 175
+ 150(5280 - x)
D. C(x) = 175
+ 150(1 - x)
Use implicit differentiation to find dy/dx.e6x = sin(x + 4y)
A. 
= - 
B. 
= 
C. 
= 
D. 
= 
Use the composition cancellation equations to decide whether or not the functions are inverses of each other.f(x) = (x - 2)2, x ? 2 and g(x) = 
A. Yes B. No