question 13:

An energy analyst forecasts that the price per barrel of crude oil five years from now will range between USD$75 and USD$105. Assuming a continuous uniform distribution, the probability that the price will be less than USD$180 five years from now is closest to

A 5.6%

B16.7%

C44.4%

这道题答案是什么弄出来的，为什么在75和105的区间都加了100呢？很不理解。

Questio 37

A company is planning a new issue of $100 par preferred stock with a 12 percent dividend. The preferred stock can be sold for $95 per share and the company must pay flotation costs of 5 percent of the market price. Assuming a marginal tax rate of 40%, the after-tax cost of the preferred stock is closest to

A.8%

B 12.6%

C13.3%

答案是100×0.12/（95×1.05）结果得C，但是按照他给的这个算法算出来的不是13.3%啊？

我的算法是13.3%但是不知道对不对，请帮我纠正一下

12%（1-40%）+5=12.5

12.5/95=13.3%

question 13:

印刷错误，就是175-205

question 13:  a continuous uniform distribution,

so p(x<180)=(180-175)/(205-175)=16.7%