Chapter 16.1, Problem 41E

(a)

To determine

To graph: The sketch of sales versus time from the beginning of $2008$ through the end of $2010$ by the use of technology if the sale is $s\left(t\right)=6.00\sin \left(1.51t+1.85\right)+15$ millions iPods per quarter $\left(0\le t\le 12\right)$. Also, find the value of time t and the quarters in which sales were lowest and highest.

(b)

To determine

The maximum and minimum quarterly sales of iPods if the equation of sale is $s\left(t\right)=6.00\sin \left(1.51t+1.85\right)+15$ millions iPods per quarter $\left(0\le t\le 12\right)$.

(c)

To determine

To calculate: The maximum and minimum quarterly sales of iPods directly from the function $s\left(t\right)=6.00\sin \left(1.51t+1.85\right)+15$ millions iPods per quarter $\left(0\le t\le 12\right)$.