Use the Dot Product to Find the Magnitude of U $\mathbf { u } = \langle 3,2 \rangle$

Multiple Choice

Use the dot product to find the magnitude of u if $\mathbf { u } = \langle 3,2 \rangle$

A) $\| \mathbf { u } \| =$ $2 \sqrt { 13 }$
B) $\| \mathbf { u } \| =$ $\sqrt { 13 }$
C) $\| \mathbf { u } \| = 6$
D) $\| \mathbf { u } \| = 5$
E) $\| \mathbf { u } \| = 7$