You have your choice of two investment accounts. Investment A is a 13-year annuity that features end-of-month $1,250 payments and has an interest rate of 7 percent compounded monthly. Investment B is a6.5 percent continuously compounded lump sum investment, also good for 13 years.

How much money would you need to invest in B today for it to be worth as much as Investment A 13 years from now?