Question 1181879
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Notice that 512 is a power of 2, namely 2^9 = 512


This means that after exactly 9 periods, each period being 45 min, the population is 512 times that of the initial count.


So at the 9*45 = 405 minute mark is when the current population is 512 times the initial population.


405 minutes = 360 min + 45 min 
405 minutes = (360/60 hr) + 45 min 
405 minutes = 6 hr + 45 min 



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Answer: 405 minutes (aka 6 hr, 45 min)
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