The sphere is non-conducting, so the charges won't be moving around.
Additionally, the charge density is uniform. If we're looking for a total charge (measured in Coulombs), we multiply the charge density, (measured in Coulombs per volume) and the volume of the sphere.
We weren't given the volume of the sphere, but we were given it's radius.
For the second, let's start by ensuring that's a location outside of the sphere. Since 80.1 cm > 29.5 cm, that works out.
In that case, we can treat the sphere of charge density as a point charge with the total charge we calculated a moment ago.
Using that number as our Q, the electric field would be kQ/r^2
r being the distance from the center of the sphere/from our point charge, 80.1 cm
k is Coulomb's constant. In SI units, that's 8.99 x 10^9 m^2/C^2
