A good answer might be:

Length of the vector   =   (9+4)   =   13
Unit vector in the first direction   =   (3, 0, 2)^T / (13)
Unit vector in the opposite direction   =   ( -3, 0, -2)^T / (13)

End of this Chapter

You should scale down your plans for a party weekend and study these topics instead:

Definition of scaling.
Definition of a scalar.
Some properties of scaling.
Equating corresponding elements in vector algebra.
Unit Vectors.
Normalizing a vector.
Orientation of a unit vector.

Click on a term to see where it was discussed in this chapter. The next chapter will discuss the dot product of two vectors.

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