Suppose that your marginal federal income tax rate is 30%, a…

Suppose that your marginal federal income tax rate is 30%, and the yield on thirty-year U.S. Treasury bonds is 5.2%. You would be indifferent between buying a thirty-year Treasury bond and buying a thirty-year municipal bond issued within your state (ignoring differences in liquidity, risk, and costs of information) if the municipal bond has a yield of