Use the Dot Product to Find the Magnitude of U $\mathbf { u } = \langle - 7,12 \rangle$

question 36

Multiple Choice

Use the dot product to find the magnitude of u. ​​ $\mathbf { u } = \langle - 7,12 \rangle$ ​

• A) \(3 \sqrt { 21 }\)
• B) \(\sqrt { 195 }\)
• C) \(\sqrt { 197 }\)
• D) \(\sqrt { 193 }\)
• E) \(\sqrt { 191 }\)

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