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[Data Sufficiency]
试题详情
题目：
For each landscaping job that takes more than 4 hours, a certain contractor charges a total of r dollars for the first 4 hours plus 0.2r dollars for each additional hour or fraction of an hour, where 
. Did a particular landscaping job take more than 10 hours?
. Did a particular landscaping job take more than 10 hours?(1) The contractor charged a total of $288 for the job.
(2) The contractor charged a total of 2.4r dollars for the job.
选项:
答案:
B
提问：
DS
解答：
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提问：
DS
解答：
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阅读779
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