Find the phase shift of the function.y = 2 sin 
A. 
units to the right
B. 2 units down
C. 2 units up
D. 
units to the left
Answer: A
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Find the product. Write the product in rectangular form, using exact values.[7(cos 120° + i sin 120°)] [2(cos 90° + i sin 90°)]
A. 14 - 14
i
B. 7
- 28 i
C. -7
- 7 i
D. 5
- 
i
Solve the problem.Given the total-revenue functionR(x) = 2x, and the total-cost functionC(x) = 0.01x2 + 0.8x + 50,if P(x) is the total profit function, find ?P and P'(x) when x = 50 and ?x = 1.
A. ?P = $0.21; P'(50) = $0.20 B. ?P = $0.20; P'(50) = $0.19 C. ?P = $0.19; P'(50) = $0.20 D. ?P = $1.81; P'(50) = $1.80
Add or subtract, if possible. Assume that all variables represent non-negative values and be sure to simplify your answer.4 
- 7
+ 6 
+ 2
A. 5
B. 10
- 5
C. 10
- 5
D. 10
- 5
Simplify.
(x - 6) - 6
A. 6x - 7
B. 
x - 5
C. 
x + 7
D. 
x - 7