Mr. Santiago a fisherman from Mulanay Quezon Province initially invested ₱500,000.00 in a local cooperative and wanted a double amount form its initial investment, Using the formula from the previous lesson on exponential function = (1 + ) where: A is the future value; P is the present value; r is the interest rate and n is the number of years, how many years will it take an investment to triple if the annual interest rate is 6%?​