Kat leaves €1600 in the bank for four years. It earns compound interest of 4% each year. Calculate the total amount Kat has in the bank at the end of the four years.

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.