Chapter 1, Problem 1.25P

For $t\ge 0,$ the voltage across and power absorbed by a two-terminal device are $v\left(t\right)=2e^{-t}\text{V}$ and $p\left(t\right)=40e^{-2t}\text{mW}\text{.}$ Find the total charge delivered to the device for $t\ge 0.$