Could someone me find the magnitude and degrees of the vectors with the given information. 12i + 4sqrt3j

notice, those two angles have a valid tangent value, however, notice the "a" and "b" components, their signs are +a and +b, meaning the angle is in the first quadrant, thus, it has to be angle in the first quadrant then.

Ibelieve the total for the tip could be $21.90

Maybe the answer is 20mm. all i really did was just multiply, which is obvious.