8. Definite Integrals

Let $f\left(x\right)=2x+3$. What is the average value of $f$ on the interval $[0,24]$?

Find the average value $f_{ave}$ of the function $f\left(x\right)=3x^2+4x$ on the interval $[-1,3]$.

What is the average value of the function $f\left(x\right)=x^2$ over the interval $[1,3]$?

Let $f$ be the function defined by $f\left(x\right)=x$. What is the average value of $f$ on the interval $[4,6]$?

Let $f\left(x\right)=x^2+1$. What is the average value of $f$ on the closed interval $[0,2]$?