Find A· B
- $$a = \langle 5 , - 8 \rangle , \quad b = \langle 3,1 \rangle$$

question 245

Multiple Choice

Find a· b.
- $$a = \langle 5 , - 8 \rangle , \quad b = \langle 3,1 \rangle$$

• A) \(\langle 8 , - 7 \rangle\)
• B) 7
• C) 23
• D) \(\langle 15 , - 8 \rangle\)

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