Homework Help: math

Posted by peter on Friday, December 9, 2011 at 3:33pm.

A certain kind of bacteria doubles in quantity every hour. At midnight two nights ago. only two of these bacteria were in a jar. At midnight last night, the jar was full. At what time was the jar half full?

math - Ms. Sue, Friday, December 9, 2011 at 3:34pm
It was half full at 11 p.m. last night.
math - Ruth, Wednesday, October 17, 2012 at 10:07pm
Could someone explain this answer.

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