Chapter 6.4, Problem 37E

(a)

To determine

To calculate: The area under the graph of $y=r(t)$ over the interval $0\le t\le 2$ where, $r(t)=12+\frac{4}{{(t+3)}^2}$ in degree Fahrenheit per hour.

(b)

To determine

The interpretation of “ the area under the graph of $y=r(t)$ over the interval $0\le t\le 2$ is $\approx 24.5$ degree Fahrenheit per hour. ”