Answer
$(g\circ f)(3)=8$
Work Step by Step
$$(g\circ f)(3)=g(f(3))$$
Note from the graph of $f$, the value of $f(3)$ is $4$. So, equations becomes:
$$(g\circ f)(3)=g(f(3))=g(4)$$
Note from the graph of $g$, the value of $g(4)$ is $8$. So, equations becomes:
$$(g\circ f)(3)=g(f(3))=g(4)=8$$
