An algebra problem by Asma Ferdousi Tanni

Algebra Level pending

It takes 30 days to fill a laboratory dish with bacteria. If the size of the bacteria colony doubles each day, how long did it take for the bacteria to fill one half of the dish?


The answer is 29.

Asma Ferdousi Tanni by Asma Ferdousi Tanni , 28, Bangladesh

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1 solution

Aareyan Manzoor
Oct 11, 2014

if each day the bacteria doubled, then in 30 days bacteria would be 2 30 . 2^{30}. so the half will be 2 30 2 = 2 29 \frac { 2^{30}}{2} =2^{29} therefore it took 29 day to half finish the dish

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