SOLUTION: For a biology lab you are looking at the growth of a bacterial colony. If your teacher started with 1 bacterium that grows at a rate of 4% every hour and by 2:15 pm when you have c

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Question 1148402: For a biology lab you are looking at the growth of a bacterial colony. If your teacher started with 1 bacterium that grows at a rate of 4% every hour and by 2:15 pm when you have class there are 1200 bacteria, what time did your teacher start the experiment? Show Work
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x, how long ago
1%2A%281.04%29%5Ex=1200
1.04%5Ex=1200
log%28%281.04%5Ex%29%29=log%28%281200%29%29
x%2Alog%28%281.04%29%29=log%28%281200%29%29
x=log%28%281200%29%29%2Flog%28%281.04%29%29
x=181hours
about 7.54 days before.