Chapter 14.2, Problem 43E

To determine

To calculate: The area between the graphs of $R\left(t\right)$ and $C\left(t\right)$ for $0\le t\le 5$ and what does the area represent where daily revenue from selling used DVD is $R\left(t\right)=100+10t$ $\left(0\le t\le 5\right)$ dollars per day, where $t$ represents days from the beginning of the week, while daily cost are $C\left(t\right)=90+5t$ $\left(0\le t\le 5\right)$ dollars per day.