1. dm/dt=0.002(50-m)^2

Solve the differential equation and show that the solution can be expressed in the form

m=50 - 500/(t+10)

2.By first expressing 1/a(10-a) as partial fractions , solve the differential equation , obtaining an expression for t in terms of a.

I got the partial fraction 1/10a + 1/10(10-a)

but i don`t have any idea what to do next.. any help ?