1.) If $5,000 had been invested in a certain investment fund on September 30, 2000, it would have been worth $22,927.93 on September 30, 2010. What interest rate, compounded annually, did this investment earn? (Round your answer to two decimal places.)

2.) How long (in years) would $700 have to be invested at 11.5%, compounded continuously, to earn $500 interest? (Round your answer to the nearest whole number.)

3.) A couple needs $50,000 as a down payment for a home. If they invest the $35,000 they have at 8% compounded quarterly, how long will it take for the money to grow into $50,000? (Round your answer to the nearest whole number.)