Suppose the U.S. Treasury offers to sell you a bond for $3,000. No payments will be made until the bond matures 15 years from now, at which time it will be redeemed for $5,600. What interest rate...

Suppose the U.S. Treasury offers to sell you a bond for $3,000.  No payments will be made until the bond matures 15 years from now, at which time it will be redeemed for $5,600.  What interest rate would you earn if you bought this bond at the offer price?