Fv=PV x ($1+r/c)^N PV=FV x 1/($1+r/c)^n - 1/r/c Fv=ANN ($1 + r/c)^n PV=Ann x ($1-$1/($1+r/c)^n/r/c im using these to find the answer to the problem but I don't know which ones to use and solve 1. You are going to put $2,500 into a savings account every month starting Sept 1, 2009, with the last payment on March 1, 2011. How much will be in the savings account on March 1, 2011, if you can earn a 4% annual rate? 2. How much must you invest today to receive $3,000 per month for twenty months (starting one month from today) if you can earn 6% annual interest