Solve the problem.For what numbers x, 0 ? x ? 2?, does cos x = -1?
A. 
, 
B. 
C. ?
D. none
Answer: C
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Evaluate the surface integral of the function G over the surface S.G(x, y, z) = x2 + y2 + z2; S is the surface of the cube formed from the coordinate planes and the planes 
and 
A. 
B. 
C. 5
D. 7
Use the zero-product property to find all complex solutions of the equation.x4 + 81x2 = 0
A. {0, -9i}
B. 
C. {±9i}
D. {0, ±9i}
Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(
- 
)2
A. xy - x
B. 2
- 2
C. xy - 2x
+ x
D. xy + x
Solve the problem. Use 3.14 as the approximate value of ? unless otherwise instructed. Round to the nearest tenth unless otherwise indicated.Three people build a rectangular shed 6 ft wide, 4 ft long, and 5 ft high. How many cubic feet does the shed contain?
A. 720 ft3 B. 15 ft3 C. 120 ft3 D. 74 ft3