Kirk VanHouten, who has been married for 18

18 years, would like to buy his wife an expensive diamond ring with a platinum setting on their 30

30-year wedding anniversary. Assume that the cost of the ring will be $21 comma 681

21,681 in 12

12 years. Kirk currently has $4 comma 500

4,500 to invest. What annual rate of return must Kirk earn on his investment to accumulate enough money to pay for thering?