Find the change in electric potential energy

[Octoshark]

Homework Statement

A uniform electric field with a magnitude of 6890 N/C points in the positive x-direction. Find the change in electric potential energy when a +12.5 µC charge is moved 5.87 cm in the following directions.

In the positive x-direction
In the negative x-direction

Homework Equations

U = qEd, right?

The Attempt at a Solution

U = (12.5 x10^-6)(6890)(0.00587) = .00050555 J or .50555 mJ

But that isn't correct, please help ;)

 

[rl.bhat]

Check the d value.

 

[Octoshark]

Whoops, thank you. I accidentally had millimeters

Got the right answer now ;)