Answer: 7.48%
Step-by-step explanation:
Weighted Average Cost of capital is simply the weighted average of the costs of equity and debt.
Cost of Equity
=
=
= 9.80%
Cost of debt
= Interest ( 1 - Tax)
= 0.075 (1 - 0.40)
= 4.65%
WACC = 9.80% * 0.55 + 4.65% * 0.45
= 7.48%