You exert a force of 325N on the ball and it compresses the spring 44.5cm. ... Charge B (-5.0*10^-6) is at the origin; charge c (+4.0*10^-6) has coordinates (5 ,0),

You exert a force of 325N on the ball and it compresses the spring 44.5cm. ... Charge B (-5.010^-6) is at the origin; charge c (+4.010^-6) has coordinates (5 ,0),