If all I have given is that 1. Bacteria grows at a rate proportional to it's size. 2. It doubles in 2 days. 3. At 10 days, population is 1000. I'm not given the initial bacteria count, I need help setting up the equation. I did: dy/dt = ky => dy/y = kdt => lny= kt + c => y=e^(kt) + c y(10)= 1000 = e^(10k) + c But I'm lost how to complete this. Any idea?