9. Bill deposits money into a bank account at the end of each year. Bill's deposit in year t is equal to 100t,t=1,2,3,. The bank credits interest at an annual effective rate of i. The amount of interest earned in Bill's account during the 11th year is equal to 500 . Find s10ii. Answer: s10ii=15 9. Bill deposits money into a bank account at the end of each year. Bill's deposit in year t is equal to 100t,t=1,2,3,. The bank credits interest at an annual effective rate of i. The amount of interest earned in Bill's account during the 11th year is equal to 500 . Find s10ii. Answer: s10ii=15