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A bacteria culture initially contains 40 cells and grows at a rate proportional to its size....

A bacteria culture initially contains 40 cells and grows at a rate proportional to its size.
After 2 hours the population has increased to 120.


a) Find an expression (in exact simplest form) for the number of bacteria after t hours.


b) Find the rate of growth at t = 5 hours. Round your final answer to nearest whole number.

Math   Calculus   
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