the distance between a charge and the source of an electric field changes from 3 mm to 6mm. As a result of the charge, the electric potential energy of the charge is

answer; /// the above statement is (true);

12000j is work done

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west