Nf = Ni X 2n
Where Nf is the final number of cells, Ni is the initial number of cells and n is the number of generations.
A fresh, sterile culture medium is inoculated with 10 E. coli bacteria. The medium is placed in an incubator at 37 oC for 2 hours. Given that E. coli can divide every 20 minutes under ideal conditions, how many cells will be present in the broth at the end of the incubation period?
Nf = 10 X 26 since there are 6 20-minute periods in 48 hours (3 generations/1 hour)
Nf = 10 X 64 = 640 bacteria