A savings account with an initial balance of $1000 earns 10% interest per year. That means that the account balance grows by a factor of 1.10each yearif no deposits or withdrawalsare made. The account balance in dollars B(t) is an exponential function of the time t in yearafter the initial deposit. a. What is the equation of this exponential function?

b. What will be the account balance after 7 years?