Solve the problem.The weekly sales in thousands of items of a product has a seasonal sales record approximated by 
in weeks with 
referring to the first week in the year). During which 
will the sales equal 73,590 items?
A. week 4 and week 47
B. week 30 and week 47
C. week 21 and week 30
D. week 4, week 20, and week 52
Answer: D
Mathematics
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A. 15 B. -15 C. -3 D. 3
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÷ 
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