Asked by Anonymous

Listeria has a current population of

400 organisms. After 72 minutes the

population increased to 6400

organisms. Calculate the doubling

time, d, of the bacteria.
Answered by Reiny
400(2)^(72/d) = 6400
2^(72/d = 16 = 2^4
so 72/d = 4
4d = 72
d = 18