# Re: Microbiology Hwk Problem, Calculating generation time

by shawonna23
Tags: generation, microbiology, time
 P: 146 Calculate the time it will take to increase the cell number from 10^4 CFU/ml to 10^8 CFU/ml assuming a generation time of 1.5 hr. 2=e^ut where t is the generation time...solve for u. x=xo*e^ut where t is time For the 1st equation: ln2=lne(ut) ln2/t=u ln2/1.5=u u=0.46 l/hr For the 2nd equation: x-xo=e^ut ln(x-xo)=lne(ut) ln(10^8-10^4)/0.46=t I don't know how to solve the 2nd equation.