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 93,720 items?
A. week 4, week 20, and week 52
B. week 4 and week 47
C. week 21 and week 30
D. week 30 and week 47
Answer: A
Mathematics
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