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October 21, 2014

Homework Help: calculus

Posted by naseba on Friday, March 30, 2012 at 8:35am.

2. The rate of change in the number of bacteria in a culture is proportional to the number present. In a certain laboratory experiment, a culture has 10,000 bacterial initially, 20,000 bacteria at time t1 minutes, and 100,000 bacteria at (t1 + 10) minutes.
a. In terms of t only, find the number of bacteria in the culture at any time t minutes, t ≥ 0,
b. How many bacteria were there after 20 minutes?
c. How many minutes had elapsed when the 20,000 bacteria were observed?

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