C. D. Rom has just given an insurance company $44,500. In return, he will receive an annuity of $6,200 for 20 years. At what rate of return must the insurance company Invest this $44,500 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.) Rate of return