Problem (6) Computing Future Value of Annual Deposits. What amount would you have if you deposited $2,500 a year for 30 years at 8 percent (compounded annually) ? Comparing Taxable and Tax-Free Yields. With a 28 percent marginal tax rate, would a tax-free yield of 7 percent or a taxable yield of 9.5 percent give you a better return on your savings? Why