Use the dot product to find $ |\mathbf{v}| $
-$$\mathbf { v } = \langle 3,8 \rangle$$
A) $\sqrt { 73 }$
B) $\sqrt { 55 }$
C) 5
D) 11

Name: Use the dot product to find $ |\mathbf{v}| $ -\[\mathbf { v } = \langle 3,8 \rangle\] A) $\sqrt { 73 }$ B) $\sqrt { 55 }$ C) 5 D) 11
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Quizplus · Accepted Answer

The magnitude of a vector $\mathbf{v} = \langle a, b \rangle$ is given by $|\mathbf{v}| = \sqrt{a^2 + b^2}$. For $\mathbf{v} = \langle 3,8 \rangle$, $|\mathbf{v}| = \sqrt{3^2 + 8^2} = \sqrt{9 + 64} = \sqrt{73}$.

Use the Dot Product to Find ∣v∣ |\mathbf{v}| ∣v∣ - v=⟨3,8⟩\mathbf { v } = \langle 3,8 \ranglev=⟨3,8⟩

Use the Dot Product to Find $|\mathbf{v}|$ - $\mathbf { v } = \langle 3,8 \rangle$