Hello! So this is going into physics because it is a physics problem, but it is maths that is the real problem. So if you came here to help someone with physics and not maths I'm sorry. 1. The problem statement, all variables and given/known data Find the force of repulsion between two point charges of +1C and +3C if they are placed 1 m apart in a vacuum. On which charge is the greater force? So here is what I know ε=8.9x10-12 π = 3.14 d = 100 cm q1 = 1 q2 = 3 cats are soft and warm 2. Relevant equations here is the formula I have to use F= 1/4πε0 Q1 Q2/d2 I can't find pi on the thing. Is this supposed to be pi: π?It looks like a Russian L. This is hard enough without alternate fonts. 3. The attempt at a solution This is going to be my fourth time trying this. The correct answer should be 2.682 x 1010 Am I right in thinking that 10-2 x 10-2 =10-4? It's just 100 x 100 = 10,000, right? 1 (1 x 10 -6) ( 3x 10-6) _______________________________________________ 4π(8.9 x 10-12)(100) Here's my attempt at solving what's above the line: 3 x 10 -12 ________________________________ 4π(8.9 x 10-12)(100) I'm less confident about what's below. Do I multiply pi by 4 first? 3 x 10 -12 ________________________________ 12.5(8.9 x 10-12)(100) Like that? Am I right in thinking that 8.9 x 10-12 x 100 = 8.9 x 10-14? So now I have 3 x 10 -12 ______________________________ 12.5 (8.9 x 10-14) 3 x 10 -12 ____________________________ 106.8 x 10-14) So there are 2 zeros there that I've put in bold that I think I have to get rid of, and I'm going to add them onto that little -14 1.068 x 10-16. Is that right? 3 x 10 -12 ___________________________ 1.068 x 10-16 Now there are loads of zeros above and below the line, am I right in thinking I can cross them out? the difference between -12 and -16 is 4, so I'll get rid of the -12 all together and leave -4 below. 3 x 10 _________________________ 1.068 x 10-4 It occurs to me that 3 x 10 is 30 and that 1.068 x 10000 is 10680 30 ______ 10680 = 0.00289575289 N Low and behold.. not the right answer. It is the second time I got this same answer though so at least that's something, I suppose. I'd really appreciate it if, even something that would inevitably cause me to get the wrong answer happened very early on, you'd tell me if there were other silly things I did with the numbers later. Thank you!