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oreilly.vincent
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if a bacteria population triples every three hours, how long will it take a population of 20 colonies to grow to 1,000?
 one year ago
 one year ago
oreilly.vincent Group Title
if a bacteria population triples every three hours, how long will it take a population of 20 colonies to grow to 1,000?
 one year ago
 one year ago

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oreilly.vincent Group TitleBest ResponseYou've already chosen the best response.1
I'm going over practice problems during break and I am stumped on this one. Forgot how to do exponential...The answer in my book says 10.683 hours.
 one year ago

xkylex Group TitleBest ResponseYou've already chosen the best response.0
Thank god its practice, il still try to figure it out
 one year ago

oreilly.vincent Group TitleBest ResponseYou've already chosen the best response.1
yeah i know! but out of everything I am reviewing I am totally missing something here...I'm pretty sure I need to find the rate and then just plug that into the log.
 one year ago

LogicalApple Group TitleBest ResponseYou've already chosen the best response.2
Are you familiar with the exponential growth equation \[N = N _{0} e ^{kt}\]
 one year ago

oreilly.vincent Group TitleBest ResponseYou've already chosen the best response.1
yes
 one year ago

LogicalApple Group TitleBest ResponseYou've already chosen the best response.2
Well, we know N0 is the initial population. N0 = 20. This corresponds to time t = 0. We also know that the population, N, triples every three hours. Thus when t = 3, N = 60. Plug these numbers in and solve for k. Then you will have a general equation.
 one year ago

oreilly.vincent Group TitleBest ResponseYou've already chosen the best response.1
awwwwwwww, yes! thank you. i have been refreshed.
 one year ago
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