11. (6 points) An exponential function has an initial value of 16 and is decreasing at a rate of 2%. Find a number t where f(0) = 3. Round to 5 decimal places ta 12. (6 points) How long will it take for your money to double if it is invested in an account with an effective interest rate of 3.6%? Round to 5 decimal places. k= 13. (6 points) The population of a town is decreasing at a rate of 4.8% per year. How long does it take for the population to be cut in half? Round to 5 decimal places,