Question

a skydiver jumped 144 feet in three seconds how long did it take per second

Answer 1

144ft------------------------------>3s

xft -------------------------------->1s

Using cross-multiplication:

$\begin{gathered} \frac{144}{x}=\frac{3}{1} \\ solve_{\text{ }}for_{\text{ }}x\colon \\ x=\frac{144\cdot1}{3} \\ x=\frac{48ft}{s} \end{gathered}$

Answer:

48ft/s