Given Vectors $\mathbf { u } = \langle - 2,5 \rangle$

Multiple Choice

Given vectors $\mathbf { u } = \langle - 2,5 \rangle$ and $\mathbf { v } = \langle 2 , - 4 \rangle$ , determine the quantity indicated below.
$$\mathbf { u } \cdot - \mathbf { v }$$

A) 20
B) 2
C) 16
D) 24
E) 18