ANSWER:
120 inches per second
STEP-BY-STEP EXPLANATION:
They ask us about the speed of the ball, which we can calculate like this
[tex]\begin{gathered} s=\frac{d}{t} \\ \text{where d is the distance and t is the time} \end{gathered}[/tex]replacing
[tex]\begin{gathered} s=\frac{600}{5} \\ s=120 \end{gathered}[/tex]