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A bacterial population starts with 10,000 bacteria and grows at a rate proportional to its size....

A bacterial population starts with 10,000 bacteria and grows at a rate proportional to its size. After 2 hours there are 40,000 bacteria.
a) Find the growth rate k. Round k to 3 decimal places. b) Find the number of bacteria after 5 hours.
c) When will the population reach 1 million?
d) What is the doubling time?

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