P13 (63)
Suppose that the number of worker-hours required to distribute new telephone books to x% of the households in a certain rural community is given by the function
W(x) = 600x / 300-x
e.What percentage of the households in the community had received new telephone books by the time 150 worker-hours had been expended?
請以中文解題
搜尋
主題 : 
