Chapter 13, Problem 5P

(a)

To determine

The heating degree hours that were experienced on a particular day from $t=0$ to $t=24$, that day temperature was modeled by the function $D\left(t\right)=61+\frac{6}{5}t-\frac{1}{25}{t}^2$.

(b)

To determine

To find: The maximum temperature that was on the day when temperature was modeled by the function $D\left(t\right)=61+\frac{6}{5}t-\frac{1}{25}{t}^2$.

(c)

To determine

The heating degree hours that were experienced on a particular day from $t=0$ to $t=24$, that day temperature was modeled by the function $E\left(t\right)=50+5t-\frac{1}{4}{t}^2$.

(d)

To determine

To find: The maximum temperature that was on the day when temperature was modeled by the function $E\left(t\right)=50+5t-\frac{1}{4}{t}^2$

(e)

To determine

The hotter day between the day with temperature $D\left(t\right)=61+\frac{6}{5}t-\frac{1}{25}{t}^2$ and the day with temperature $E\left(t\right)=50+5t-\frac{1}{4}{t}^2$.