At the beginning of a population study, a city had240,000people. Each year since, the population has grown by3.8%.Lettbe the number of years since start of the study. Letybe the city's population.Write an exponential function showing the relationship betweenyandt.

Suppose that$2000is invested at a rate of3.2%,compounded quarterly. Assuming that no withdrawals are made, find the total amount after4years.Do not round any intermediate computations, and round your answer to the nearest cent