单选题The population of Boomtown doubles every 18 months. In January of 2000, its population was exactly 12, 000. At this rate, approximately when should the population reach 96, 000?AJanuary 2003BJuly 2004CJanuary 2006DJuly 2007EJanuary 2012
单选题
The population of Boomtown doubles every 18 months. In January of 2000, its population was exactly 12, 000. At this rate, approximately when should the population reach 96, 000?
A
January 2003
B
July 2004
C
January 2006
D
July 2007
E
January 2012
参考解析
解析：
因为2000年，人口数量为12,000，每18个月增长一倍，所以第1个18个月增长到24000，第2个18个月增长到48, 000，第3个18个月增长到96,000，所以也就3个1年半时间，也就是需要4年6个月时间，人口增长到96,000。因为按这个速度开始增长的起始时间为2000年1月，所以那时候为2004年7月。
因为2000年，人口数量为12,000，每18个月增长一倍，所以第1个18个月增长到24000，第2个18个月增长到48, 000，第3个18个月增长到96,000，所以也就3个1年半时间，也就是需要4年6个月时间，人口增长到96,000。因为按这个速度开始增长的起始时间为2000年1月，所以那时候为2004年7月。
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