When first observed, an oil spill covers 6 square miles. Measurements show that the area is tripling every 8 hrs. Find an exponential model for the area A (in mi²) of the oil spill as a function of time t (in hr) from the beginning of the spill. (Enter a mathematical expression.)

A(t)=

-A restaurant owner deposits $6,000 into an account that earns an annual interest rate of 6% compounded monthly. Find an exponential growth model for A, the value of the account (in dollars) after t years. (Enter a mathematical expression)

A=