Sarah was driving at 50 mph ( miles per hour) and went a distance of 100 miles. How long did it take Sarah to drive that distance? Solve for time.

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.