为啥之前的capital和最新ppt的capital不一样？

不会用过低或过高收益率进行再投资是什么意思？

老师好，这是金程提供的原版书课后题time value部分18题。请问，2/(0.06/4)=133已经是PV了，为什么下面还要再折现4次呢，谢谢

13. Comte Industries issues $3,000,000 worth of three-year bonds dated 1 January 2015. The bonds pay interest of 5.5% annually on 31 December. The market interest rate on bonds of comparable risk and term is 5%. The sales proceeds of the bonds are $3,040,849. Under the straight-line method, the interest expense in the first year is closest to: A. $150,000. B. $151,384. C. $152,042. 老师，这题我怎么算得，要选C，而答案却要选B呢？麻烦帮忙讲解一下：the straight-line method；Amortized cost method；Effective interest rate method,这三种方法的区别和相同之处呢？

12. For a bond issued at a premium, using the effective interest rate method, the: A. carrying amount increases each year. B. amortization of the premium increases each year. C. premium is evenly amortized over the life of the bond. 老师这道题，我怎么觉得carrying amount，amortization of the premium这两项都是逐年递减的，而C答案说的是平价债券，怎么感觉都没有正确答案呢？麻烦讲解一下。

10. A company issues $30,000,000 face value of five-year bonds dated 1 January 2015 when the market interest rate on bonds of comparable risk and terms is 5%. The bonds pay 4% interest annually on 31 December. Based on the effective interest rate method, the carrying amount of the bonds on 31 December 2015 is closest to: A. $28,466,099. B. $28,800,000. C. $28,936,215. 老师，麻烦讲解一下这道题，我怎么算不出选项中的答案呀，麻烦附一下解题过程。谢谢。

reading15 the firm and market structures 为什么选b 能不能把图画出来？ 谢谢

为什么这个题目选c a错在哪里，mr曲线是哪条曲线

关于单位弹性 unit elastic的问题 课后习题为什么在需求曲线中total revenue最大值的时候是在弹性为单位弹性的时候?

10. A company issues $30,000,000 face value of five-year bonds dated 1 January 2015 when the market interest rate on bonds of comparable risk and terms is 5%. The bonds pay 4% interest annually on 31 December. Based on the effective interest rate method, the carrying amount of the bonds on 31 December 2015 is closest to: A. $28,466,099. B. $28,800,000. C. $28,936,215. 请老师讲解一下这道题。谢谢。