Michael J. answered • 11/22/16

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Effective High School STEM Tutor & CUNY Math Peer Leader

Use the formula

f(x) = Ca

^{x}f(x) = 5000(1 - 0.25)

^{x}f(x)= 5000(0.75)

^{x}**where:**

f(x) = the amount of bacteria after amount of weeks

C = initial amount of bacteria

a = growth factor

x = the time in weeks

So now evaluate f(4) to find the amount of bacteria after 4 weeks.