A roller coaster has a height of 325 feet before its first hill, and the bottom of the hill is 30 feet off the ground. What is the height of the drop? The height of the drop is __ feet.

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.