Use the Dot Product to Find the Magnitude of U $\mathbf { u } = 35 \mathbf { i } + 40 \mathbf { j }$

Multiple Choice

Use the dot product to find the magnitude of u.​ $\mathbf { u } = 35 \mathbf { i } + 40 \mathbf { j }$ ​

A) 40
B) $\sqrt { 2829 }$
C) $\sqrt { 2823 }$
D) $5 \sqrt { 113 }$
E) 35