Solve the Problem $\mathrm { n } = 85.94 + 25.1 \sin \frac { \pi \mathrm { t } } { 24 } ( \mathrm { t } =$

question 68

Multiple Choice

Solve the problem.
-The weekly sales in thousands of items of a product has a seasonal sales record approximated by $\mathrm { n } = 85.94 + 25.1 \sin \frac { \pi \mathrm { t } } { 24 } ( \mathrm { t } =$ time in weeks with $\mathrm { t } = 1$ referring to the first week in the year) . During which week(s) will the sales equal 98,490 items?

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

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