Jerry pawned his power tools (valued at $800) for $450 cash. Assuming he pays the pawnbroker $40 a month for three months and then pays back the full original balance to retrieve his tools, what was the approximate annual interest rate for this loan?

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.