Problem Solving
试题详情
题目：
The cost C, in dollars, to remove p percent of a certain pollutant from a pond is estimated by using the formula . According to this estimate, how much more would it cost to remove 90 percent of the pollutant from the pond than it would cost to remove 80 percent of the pollutant?
选项:
A、$500,000
B、$100,000
C、$50,000
D、$10,000
E、$5,000
答案:
A
