A colony of bacteria, isolated for culture, reproduces in such a way that its volume triples every two minutes. If, in ten minutes, a vat containing a certain volume of bacteria is completely full, in how many minutes did the bacteria occupy a third of the vat?
3x each 2min.
10 min the full volume
2min - 3x
4min - 3x3=9
6min - 3x3x3=27
8min - 3x3x3x3=81
10min - 3x3x3x3x3=243
243 divided by 3 = 81, 1/3 of the volume is 81 in the table that I had write the 81 in volume is at 8min.
Rute Bezerra de Menezes Gondim
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