SOLUTION: The growth of a bacterial culture works in an exponential form. If a bacteria culture on a piece of bread starts with 10 000 bacteria and the doubling period is 45 minutes. After h

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Question 1111910: The growth of a bacterial culture works in an exponential form. If a bacteria culture on a piece of bread starts with 10 000 bacteria and the doubling period is 45 minutes. After how many minutes will there be 60 000 bacteria?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
One doubleing period 45%2F45.
x minutes, x%2F45;

y=10000%282%29%5E%28x%2F45%29

If y=60000, find x.
10000%2A2%5E%28x%2F45%29=60000
2%5E%28x%2F45%29=6
%28x%2F45%29log%28%282%29%29=log%28%286%29%29

x=45%2Alog%28%286%29%29%2Flog%28%282%29%29, and you can use calculator or table of common logarithms.