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OpenStudy (anonymous):
The population of a colony of bacteria doubles every 21 hours. How long, in hours, does it take for the population to be approximately 5.0 times its original size? Answer correct to one decimal place.
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OpenStudy (paxpolaris):
\[\Large 5= 2^{t/21}\]
OpenStudy (paxpolaris):
so what's your answer?
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