Marylou is blowing up a beach ball. the package says that the ball has a diameter of 18 inches. what is the volume of the beach ball when it is completely full?

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.