Solve the problem.For f(x) = x2, find f(9 - 
)
A. 81 + 
B. 88 + 18
C. 87 + 
D. 88 - 18
Answer: D
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Solve the problem.Suppose that the amount of oil pumped from a well decreases at the continuous rate of 
per year. When, to the nearest year, will the well's output fall to one-eighth of its present value?
A. 2 years B. 10 years C. 15 years D. 22 years
Determine where the given function is concave up and where it is concave down. f(x) = 7x - x3
A. Concave up on (0, ?), concave down on (-?, 0) B. Concave down for all t C. Concave up on (-?, 0), concave down on (0, ?) D. Concave up on (-?, 0) and (1, ?), concave down on (0, 1)
Find the volume of the solid generated by revolving the region about the given axis. Use the shell or washer method.The region bounded by y = 4x - x2 and y = x about the y-axis
A. 
?
B. 
?
C. 
?
D. 
?
Indicate whether the equation illustrates the additive identity property, multiplicative identity property, additive inverses, or multiplicative inverses.-7.2 + 7.2 = 0
A. Multiplicative identity B. Additive identity C. Multiplicative inverse D. Additive inverse