1. The problem statement, all variables and given/known data A spherical insulator of radius R and charge density ρ = ρo/r2 where r is the distance from its centre. Find the electric field at a point inside and outside the insulator. 2. Relevant equations EA = Qencl/εo 3. The attempt at a solution What's throwing me off is the charge density. Setting up a gaussian sphere, I don't know what to do to find Q for the formula.