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A cell of some bacteria divides into two cells every 40 minutes.The initial population is 4...

A cell of some bacteria divides into two cells every 40 minutes.The initial population is 4 bacteria.

a: Find the size of the population after t hours. y(t)=

b: Find the size of the population after 5 hours. y(5)=

c: When will the population reach 20? T=

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