Estimate the present value of an annuity if payments are $770 monthly for 12 years and the account earns interest at the rate of 10%/yr compounded continuously. $11088 Leah wishes to supplement her retirement income by $500/month for the next 15 years by obtaining a reverse annuity mortgage (RAM). Estimate the amount of the mortgage she will require if the prevailing interest rate is 9%/year compounded continuously. $190621.91