Solve the problem.A new health food store runs an advertising campaign. Daily sales (in dollars) after x days of advertising are given by ?S(x) = 
By sketching the graph of this function, answer the following questions. What is the horizontal asymptote of the graph? What does this suggest about future sales? Explain your reasoning. If the advertising campaign costs $3200 per day, at what point should it be discontinued? Why?
What will be an ideal response?
Answers will vary. Possible answer: The horizontal asymptote is 
This suggests that eventually daily sales will level off at around $2500. Thus the minimum daily sales to be expected are $2500. The advertising campaign should be discontinued after 7 days because after 7 days the cost of the campaign is higher than the daily sales.
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Find the center and radius of the sphere.x2 + (y + 3)2 + (z - 4)2 = 49
A. C(0, 3, -4), a = 49 B. C(0, -3, 4), a = 49 C. C(0, 3, -4), a = 7 D. C(0, -3, 4), a = 7
Find the flux of the curl of field F through the shell S.F = -3yi - 5zj - 9xk; S: r(r, ?) = r cos ?i + r sin ?j + (36 - r2)k, 0 ? r ? 6 and 0 ? ? ? 2?
A. 108? B. 18? C. -108? D. 108
Solve the problem.Find the volume of the solid generated by revolving the region in the first quadrant bounded by the coordinate axes, the curve y = e-2x, and the line x = 3 about the y-axis.
A. 
?(1 - 6 e-6)
B. 
?(1 - 5 e-6)
C. 
?(1 - 7 e-6)
D. - 
?(1 + 7 e-6)
Find the APR to the nearest 0.5%. Use the Annual Percentage Rate table if necessary.
The owner of an automobile repair center purchased new electronic diagnostic equipment for $20,000. He paid 
down and then paid 60 monthly payments of $386.43. Determine the APR of the loan to the nearest 0.5%.
A. 9.0% B. 9.5% C. 8.5% D. 8.0%