The Empire State Building is 1250 feet tall. Brock makes a scale model of the building at 1:250 of its actual size. How tall is the model?

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.