## College Physics (4th Edition)

$4.59\times 10^2~m/s$
$(3.21~m)/(7.00~ms)$ $= (3.21~m)/(7.00 \times 10^{-3}~s)$ $= 0.459\times 10^3~m/s$ $= 4.59\times 10^2~m/s$