Solve the problem.The weekly sales in thousands of items of a product has a seasonal sales record approximated by 
(t is time in weeks with 
referring to the first week in the year). During which week(s) will the sales equal 80,600 items?
A. week 21 and week 30
B. week 30 and week 47
C. week 4 and week 47
D. week 4, week 20, and week 52
Answer: D
Mathematics
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Find the total area of the region between the curve and the x-axis.y = -x2 + 9; 0 ? x ? 5
A. 
B. 
C. 
D. 
Mathematics
Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the y-axis.y = 
, y = 0, x = 1, x = 25
A. 
?
B. 840?
C. 
?
D. 
?
Mathematics
Evaluate, if possible-
A. -3 B. Not a real number C. -9 D. -2
Mathematics
For the given geometric sequence, find the limit of the infinite series, if it exists. 3, 1, 
, 
, . . .
A. 4
B. 3
C. 
D. 1
Mathematics