Assume BMC's effective tax rate is 30%, weighted average cost of capital is 9%, and numb BMC Software has a debt-equity ratio of 0.50, an unlevered cost of capital of 15 percenta what is its levered cost of equity? 15.55% 21.00% 18.15% 17.80% eighted average cost of capital is 9%, and number of shares outstanding is 146M. If -50, an unlevered cost of capital of 15 percent and a pretax cost of debt of 6%