1. The problem statement, all variables and given/known data Within the spherical shell, 3 < r < 4 m, the electric flux density is given as D = 5(r − 3)3 ar C/m2 a) What is the volume charge density at r = 4? b) How much electric flux leaves the sphere r = 4? 2. Relevant equations ρv=Div D Electric flux = ∫sD.ds=∫vρvdv 3. The attempt at a solution I got the correct answer for part a which is 17.5 C/m3. My confusion is in part b. I'm only getting the correct answer by using Electric flux = ∫sD.ds. Multiplying volume charge density by the volume of the sphere gives me the wrong answer and I don't understand why. Please help me figure out my mistake. Thank you so much!