Determine $u.v$ If $\| \mathbf { u } \| = 5$ $\| \mathbf { v } \| = 4$

Multiple Choice

Determine $u.v$ if $\| \mathbf { u } \| = 5$ , $\| \mathbf { v } \| = 4$ ,and $\theta = \frac { \pi } { 4 }$ where θ is the angle between u and v.Round answer to two decimal places.

A) 15.73
B) 12.07
C) 10.00
D) 17.32
E) 14.14