Find the Magnitude $\mathbf { u } = \langle 3,4 \rangle$

question 96

Multiple Choice

Find the magnitude.
-Let $\mathbf { u } = \langle 3,4 \rangle$ . Find the magnitude (length) of the vector: $- 3 \mathbf { u }$ .

• A) 75
• B) \(- 15 \sqrt { 5 }\)
• C) 15
• D) \(- 15\)

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