A bacterial population doubles every hour. If there are 1000 bacteria now, when

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A bacterial population doubles every hour. If there are 1000 bacteria now, when were 125 bacteria present?

Options:

A . 1 hour ago

B . 2 hours ago

C . 3 hours ago

D . 5 hours ago

Answer: Option C
:
C
If there are 1000 bacteria now, 1 hour agothere would have been 500 since the number of bacteria doubles every hour. 2 hours ago there would have been half of 500 bacteria, that is 250 bacteria. 3 hours ago there would have been 125 bacteria.

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