A bacteria culture starts with 500 bacteria and doubles in size every 30 minutes. Graph the population function and estimate the time for the population to reach 20,000.

So far I did 20,000/500 = 2^(x/30)

which is 40= 2^(x/30)

now how do i get rid of the fractional exponent (x/30)??

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Also if g(x) = 4 + x + e^x

find g^-1 (5)