You can model the population of a certain city between the years 1955 and 1995 by the radical function P(x) = 80000^3√x-1940. Using this model, in what year was the population of that city 290,000?

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.