1. The problem statement, all variables and given/known data The fish population in a lake is attacked by a disease at time t=0 with the result that the size P(t) of the population at time t: dP/dt= -k*sqrt(P) where k is a positive constant. If there were initially 90,000 fish in the lake and 40,000 were left after 6 weeks, when will the fish population be reduced to 10,000? 3. The attempt at a solution integrate [(90,000->40,000) dP/sqrt(P)] = integrate [(0->t)-kdt] then set t= 6 and solve for k this was a question on a test I did not know how to do could you tell me if I am on the right track?