C. D. Rom has just given an insurance company $39,500. In return, he will receive an annuity of $5,200 for 20 years.

At what rate of return must the insurance company invest this $39,500 in order to make the annual payments? Use Appendix D for an approximate answer, but calculate your final answer using the financial calculator method. (Do not round intermediate calculations. Round your final answer to 2 decimal places.)