## Intermediate Algebra (12th Edition)

We are asked to find $(f∘f)(4)$. We know that $(f∘f)(x)=f(f(x))$. Therefore, $(f∘f)(4)=f(f(4))$. From the first table, we see that $f(4)=3$. From the first table, we see that $f(3)=1$. Therefore, $f(f(4))=f(3)=1$.