Growth Rate One measurement of the quality of a mutual fund is its average annual gr...

Growth Rate One measurement of the quality of a mutual fund is its average annual growth rate over the last 10 years. The function expresses the average annual growth rate r as a function of the present value P of an investment of $10,000 made 10 years ago. An investment of $10,000 in Fidelity’s Contrafund in 2002 was worth $21,931 in 2012 (Fidelity Investments, www.fidelity.com). What was the annual growth rate for that period? Write P as a function of r.