I'm sure this is so easy and just 1 step. I can do questions like this, I just don't understand, this theory one, or whatever it is. 1. The problem statement, all variables and given/known data How far apart are two protons if they repel each other with a force of 1.0 mN? 2. Relevant equations F=k * Q1Q2/r^2 k=9.00*10^9 e=1.6*10^-19 3. The attempt at a solution F=k * Q1Q2/r^2 .001N = 9*10^9 * 1.6*10^-19 * 1.6*10^-19/ r^2 .001 = 2.304 *10^28/r^2 r^2= 2.304*10^28/.001 r= 4.8 * 10^-13 m. ***the answer key says: 1.5 x 10-11 m. please if you could help me quick it would be amazing.