The value of a brand new car is dollar sign, 31, comma, 000$31,000 and the value depreciates 15% every year. Write a function to represent the value of the car after tt years, where the monthly rate of change can be found from a constant in the function. Round all coefficients in the function to four decimal places. Also, determine the percentage rate of change per month, to the nearest hundredth of a percent.
