Answer
$$s(t) = 16t^2+20$$
Work Step by Step
Given $v(t) =32t$, $s(0)=20$
Since
\begin{align*}
s'(t)&=v(t)\\
s(t)&=\int v(t)dt\\
&=\int 32t dt\\
&=16t^2+c
\end{align*}
Since $s(0)=20$, then $c=20$, and
$$s(t) = 16t^2+20$$
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