SOLUTION: A bacteria triples its population in 30 minutes. At this rate how many bacteria will there be in 2 hours if there are 500 now?

Question 621881: A bacteria triples its population in 30 minutes. At this rate how many bacteria will there be in 2 hours if there are 500 now?
Answer by dragonwalker(73) (Show Source): You can put this solution on YOUR website!
As the time it takes to triple is 30 minutes, how many times will this happen in 2 hours?
2 hours = 2 x 60 = 120 minutes
so 120/30 = 4
So the bacteria will triple four times in 2 hours.
3x500 + 3(3x500) + 3(3x3x500) + 3(3x3x3x500) = 1500 + 4500 + 13500 + 40500
= 60000
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