Answer:
a tax-rate for 33.33% will make both investment yield an equal return after-taxes
Explanation:
the municipal bonds aare tax free, while the J and K Corp.'s bond are subject to tax income.
threfore to be indifferent between these bonsd the tax rate will equal the corp bon rate after taxes with the municipal bond:
pretax x (1 - t ) = after tax
0.195 x (1-t) = 0.13
1 - 0.13/0.195 = t
t = 1/3 = 33.33%