A car traveled 200 miles south Onl-29 in 4 hours. What's it's velocity

V=Δd/Δt, so you simply divide the distance you've gone (200mi) by your time (4 hours), so, 80mph. (Fast!)

Though, that's just speed. Velocity has a direction component, that's why it isn't just speed. So it'd be Δv/Δt in the given direction. (80mph South)