1. The problem statement, all variables and given/known data A culture begins with 100,000 bacteria and grows to 125,000 bacteria after 20 min. What is the doubling period to the nearest minute? 2. Relevant equations Current=Original(rate)^time 3. The attempt at a solution I can get make the first part out. 125000=100000(rate)^2 I have a feeling its wrong but its as far as i can get.