Chapter 6.1, Problem 22P

To determine

(a)

To estimate:

The value of ${\displaystyle \underset{0}{\overset{4}{\int }}f(x)dx}$ for $f(x)$.

To determine

(b)

To find:

Whether $F(x)$ is increasing or decreasing in the interval $0\le x\le 4$.

To determine

(c)

To estimate:

The value of $F(4)$ if $F(0)=20$.