Factor out the greatest common factor. Simplify the factors, if possible.8x7y9 + 28x2y7 + 28x4y5
A. 4x2(2x5y9 + 7y7 + 7x2y5)
B. 4x2y5(2x5y4 + 7y2 + 7x2)
C. 4(2x7y9 + 7x2y7 + 7x4y5)
D. x2y5(8x5y4 + 28y2 + 28x2)
Answer: B
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Solve.The function h(t) = -16t2 + 80t - 96 gives the height h, in feet, of a flare fired from the bottom of a gorge 96 feet deep with an initial velocity of 80 ft/sec. The flare fired is visible only when it is above the rim (h = 0). During what interval can the flare be seen?
A. (0, 2) B. (6, 7) C. (4, 5) D. (2, 3)
Evaluate the second derivative of the function for the given value of x.f(x) = 
; x = 1
A. 
B. - 
C. - 
D. 
Find the derivative of the function.f(t) = (3 - t)(3 + t3)-1
A. f '(t) = 
B. f '(t) = 
C. f '(t) = 
D. f '(t) = 
The function f is one-to-one. Find its inverse.f(x) = 
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = 