GMAT数学题,求救
a certain culture of bacteria quadrupled every hour.if a container with these bacteria was half full at 10:00am,at what time was it one-eight full?
但是答案上写是凌晨2点啊～为什么呢?
人气：195 ℃ 时间：2020-07-05 05:32:06
解答
细菌数翻四倍需要1小时
半满时是10点,
1小时前,9点：1/2 处以4 =1/8
答案：9点的时候八分之一满
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