23. Two years ago, a company issued $20 million in long-term bonds at par value with a coupon rate of 9 percent. The company has decided to issue an additional $20 million in bonds and expects the new issue to be priced at par value with a coupon rate of 7 percent. The company has no other debt outstanding and has a tax rate of 40 percent. To compute the company's weighted average cost of capital, the appropriate after-taxcostofdebt is closest to: A. 4.2%. B. 4.8%. C. 5.4%. 两年前发行的20M就不考虑在内了吗？

2. Which of the following statements is correct? A. The appropriate tax rate to use in the adjustment of the before-tax cost of debt to determine the after-tax cost of debt is the average tax rate because interest is deductible against the company's entire taxable income. B. For a given company, the after-tax cost of debt is generally less than boththecost of preferred equity and the cost of common equity. C. For a given company, the investment opportunity schedule is upward sloping because as a company invests more in capital projects, the returns from investing increase. B的说法严谨吗？也有债券融资成本很高的公司吧？

为什么50-delta是at the money,25-delta是out of the money?

为什么选A题干不是说了 recognize as revenue吗

R44的第十四道题目优先股的面值是3.6，股利是3.6*0.15新第二年本金仍然是3.6没有变化。为什么答案是1.15的六次方，按照复利计算呢？

balance sheet上的新增也是用average到ending的通货膨胀吗？

reading15 课后题33，为什么D中不包括benefit expense change？

老师，value added这里，两种算法，一种定义式，一种是区分那种超额收益，没区别的吧，只是计算目的不一样，一般计算用哪个？

所以这里是选B是因为2－1等1，而不是表格中给了1对吗

老师，你好，在做题的过程中，看到有一个题目的答案解析中写到，根据公司治理的最佳实践，当一个人被任命为公司的CEO时，他也可以是董事会成员，只要不是董事会主席就可以。对于这里的说法有些不理解，因为记得老师上课说过，董事会是起到监督管理层的作用，如果既是董事会成员，又是CEO，自己监管自己，这不是会存在潜在的冲突吗？