Use the Vectors U and V to Find U · $\mathbf { u } = 6 - \mathbf { j } + 7 \mathbf { k } \quad \mathbf { v } = 5 \mathbf { i } + 5 \mathbf { j } - \mathbf { k }$

Multiple Choice

Use the vectors u and v to find u · (u × v) . $\mathbf { u } = 6 - \mathbf { j } + 7 \mathbf { k } \quad \mathbf { v } = 5 \mathbf { i } + 5 \mathbf { j } - \mathbf { k }$

A) $\mathbf { u } ( \mathbf { u } \times \mathbf { v } ) = 10$
B) $\mathbf { u } ( \mathbf { u } \times \mathbf { v } ) = - 10$
C) $\mathbf { u } \cdot ( \mathbf { u } \times \mathbf { v } ) = 9$
D) $\mathbf { u } \cdot ( \mathbf { u } \times \mathbf { v } ) = - 9$
E) $\mathbf { u } \cdot ( \mathbf { u } \times \mathbf { v } ) = 0$