Answer:
11.466%
Step-by-step explanation:
WACC = cost of equity x percentage of equity + cost of debt x percentage of debt x (1 - tax rate)
percentage of debt = 10,000 / 30,000 = 0.33
percentage of equity = 1 - 0.33 = 0.67
0.67 x 14% + 0.33 x 8% x (1 - 0.21) = 2.086% + 9.38% = 11.466%