Solving Vector C with Unit Vectors | Cross Product Help

[Eats Dirt]

Homework Statement

use unit vectors to express the vector C where C=3.00A-4.00B
the answer is apparently C=12.0i + 14.9j

Homework Equations

cross product

The Attempt at a Solution

i have no idea where to even start how is it possible to find the i orj because i don't even know the components of A or B

 

[xhhux]

To find the unit vector you're going to have to divide each component of the vector by the magnitude of the vector.