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?

Question

erinweeks · Answer

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

erinweeks · Answer

@greenleaf800073 could you helpme with this?

anonymous · Answer

It's A, hehe, I just did substitution

erinweeks · Answer

okay thankkk yaa (:

anonymous · Answer

:D