Solve the Problem $\mathbf { v } = 9 \mathbf { i } + 3 \mathbf { j }$

question 137

Multiple Choice

Solve the problem.
-If $\mathbf { v } = 9 \mathbf { i } + 3 \mathbf { j }$ , what is $\| 8 \mathbf { v } \|$ ?

• A) \(48 \mathrm { i } \sqrt { 2 }\)
• B) \(24 \sqrt { 10 }\)
• C) \(- 24 \sqrt { 10 }\)
• D) \(48 \sqrt { 2 }\)