The weekly sales in thousands of items of a product has a seasonal sales record approximated by n = 84.59 + 24.8 sin πt/24 (t is time in weeks with t = 1 referring to the first week in the year). During which week(s) will the sales equal 96,990 items?

A. week 4, week 20, and week 52
B. week 21 and week 30
C. week 4 and week 47
D. week 30 and week 47

Question

The weekly sales in thousands of items of a product has a seasonal sales record approximated by n = 84.59 + 24.8 sin πt/24 (t is time in weeks with t = 1 referring to the first week in the year). During which week(s) will the sales equal 96,990 items?

A. week 4, week 20, and week 52	
B. week 21 and week 30	
C. week 4 and week 47	
D. week 30 and week 47

anonymous · Answer

plug in number for t where n=96.99

anonymous · Answer

so 84.59 + 24.8 sin pi(20)/24=?