Find $\mathbf { u } \cdot \mathbf { Y }$ . $\mathbf { u } = \langle 5,0 ) , \mathbf { v } = ( \sqrt { 3 } , 1 )$
A) $16$
B) $- 16$
C) $5 \sqrt { 3 } + 1$
D) $5 \sqrt { 3 }$
E) $5$

Question

Quizplus · Accepted Answer

The dot product $\mathbf { u } \cdot \mathbf { Y }$ seems to be a typo, and it should likely be $\mathbf { u } \cdot \mathbf { v }$. The dot product is calculated as $u_1v_1 + u_2v_2$, which in this case is $5 \times \sqrt{3} + 0 \times 1 = 5\sqrt{3}$.

Find u⋅Y\mathbf { u } \cdot \mathbf { Y }u⋅Y u=⟨5,0),v=(3,1)\mathbf { u } = \langle 5,0 ) , \mathbf { v } = ( \sqrt { 3 } , 1 )u=⟨5,0),v=(3​,1)

Find $\mathbf { u } \cdot \mathbf { Y }$ $\mathbf { u } = \langle 5,0 ) , \mathbf { v } = ( \sqrt { 3 } , 1 )$