An investment of Z is made into fund X which pays an effective rate of discount of 9% for 15 years. At the same time, an investment of 2Z is made into fund Y which pays an effective rate of interest of i for 15 years. The amount of interest earned over the 15 years are equal for both funds. Calculate i. An investment of Z is made into fund X which pays an effective rate of discount of 9% for 15 years. At the same time, an investment of 2Z is made into fund Y which pays an effective rate of interest of i for 15 years. The amount of interest earned over the 15 years are equal for both funds. Calculate