Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Answer: A
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Find the area of the specified region.Shared by the circle r = 9 and the cardioid r = 9(1 + sin ?)
A. 
(5? + 8)
B. 0
C. 81
D. 
(5? - 8)
Solve.An experienced accountant can balance the books twice as fast as a new accountant. Working together it takes the accountants 6 hours. How long would it take the experienced accountant working alone?
A. 3 hr B. 12 hr C. 9 hr D. 15 hr
Express the function in the form f(x) = a(x - h)2 + k and indicate the vertex.f(x) = x2 + x - 8
A. f(x) = (x + 1)2 - 8
vertex: (-1, -8)
B. f(x) = (x -1)2 - 6
vertex: (1, -6)
C. f(x) = (x + 
)2 - 
vertex: 
D. f(x) = (x - 
)2 - 
vertex: 
Solve the problem.The height h of a ball thrown is given by 
, where x is the horizontal distance traveled and both measurements are in feet. At what horizontal distances will the height of the ball be more than 
(Round distances to the nearest tenth of a foot, if necessary.)
A. 5.9 ft < x < 25 ft B. 0 ft < x < 19.1 ft C. 0 ft < x < 5.9 ft or 19.1 ft < x < 25 ft D. 5.9 ft < x < 19.1 ft