Solve the problem.The area A = ?r2 of a circular oil spill changes with the radius. To the nearest tenth of a square foot, how much does the area increase when the radius changes from 8 ft to 8.1 ft?
A. 3.2 ft2
B. 50.3 ft2
C. 25.1 ft2
D. 5.0 ft2
Answer: D
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Express the terminating decimal number as a quotient of two integers.1.54
A. 
B. 
C. 
D. 
Solve the problem.A grasshopper is perched on a reed 5 inches above the ground. It hops off the reed and lands on the ground about 7.3 inches away. During its hop, its height is given by the equation 
, where x is the distance in inches from the base of the reed, and h is in inches. How far was the grasshopper from the base of the reed when it was 3.5 inches above the ground? Round to the nearest tenth.
A. 5.9 inches B. 0.9 inches C. 7.3 inches D. 1.4 inches
Graph the function.f(x) = 2e-x
A. 
B. 
C. 
D. 
?The profit P (in thousands of dollars) for a company spending an amount s (in thousands of dollars) on advertising is 
. The point of diminishing returns is the point at which the rate of growth of the profit function begins to decline. Find the point of diminishing returns. Round your answer to the nearest thousand dollars.
?
A. ?43 thousand dollars B. ?130 thousand dollars C. ?104 thousand dollars D. ?173 thousand dollars E. ?87 thousand dollars