finding the norm of a scalar product

I jus had a quick question. in my study guide I am asked to find the norm of a scalar product? this would simply be |3**V**|? where im actually getting the magnitude of the scalar? is this what the question is asking me to do? I jus wanted to make sure i had it right.

and i had one more question, the next question is asking me to find the magnitude of the projection. so could i write this representation as follows? |proj of j onto u| =

|(u dot j/|v|^2) U|? thanks in advance.