Homework Help: math

Posted by Ross on Thursday, September 9, 2010 at 4:33pm.

It takes 28 minutes for a certain bacteria population to double. If there are 4,241,763 bacteria in this population at 1:00 p.m., which of the following is closest to the number of bacteria in millions at 4:30 pm on the same day?

math - Reiny, Thursday, September 9, 2010 at 6:27pm
time from 1:00 to 4:30 is 3.5 hours
28 minutes = 28/60 or .466667 hours

N = 4241763(2)^(3.5/.466667)
= 4241763(2)^7.5
= appr. 767 841 122

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