Answer:
before tax corportate bond equivalent: 11.15%
Step-by-step explanation:
The municipal bond are tax-free making them more attractive than normal corporate bonds.
thus, the municipal bond rate should be compare with the after tax rate of a corporate bond:
before tax rate ( 1 - tax rate) = after tax rate
For this case:
the after tax rate is 7.25%
and the tax bracket is 35%
before taxes ( 1 - 0.35) = 0.0725
0.0725/.65 = 0,1115384 = 11.15%