Graph the Function Over a One-Period Interval Which Week(s) Will the Sales Equal 69,770 Items?
A) Week

Multiple Choice

Graph the function over a one-period interval.
-The weekly sales in thousands of items of a product has a seasonal sales record approximated by $$\mathrm { n } = 59.02 + 21.5 \sin \frac { \pi \mathrm { t } } { 24 } ( \mathrm { t } = \text { time in weeks with } \mathrm { t } = 1 \text { referring to the first week in the year } ) \text {. During }$$ which week(s) will the sales equal 69,770 items?

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