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I think the question means to say that the growth rate is (double every 2 minutes).

doubling interval = 2 minutes

1 hour = 60 minutes = (60 / 2) = 30 doubling intervals

Starting with 1 bacterium and reproducing asexually (do bacteria do this ? What do I know. I'm only an EE.) . . . . .

If all survive, then the population after doubling 30 times = 230 = 1,073,741,824 bugs.

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