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Find A· B
- a=4i+6j,b=−5i−0.5j\mathbf { a } = 4 \mathbf { i } + 6 \mathbf { j } , \quad \mathbf { b } = - 5 \mathbf { i } - 0.5 \mathbf { j }

Question 204

Multiple Choice

Find a· b.
- a=4i+6j,b=−5i−0.5j\mathbf { a } = 4 \mathbf { i } + 6 \mathbf { j } , \quad \mathbf { b } = - 5 \mathbf { i } - 0.5 \mathbf { j }


A) −23- 23
B) ⟨−1,5.5⟩\langle - 1,5.5 \rangle
C) ⟨−20,−3⟩\langle - 20 , - 3 \rangle
D) 17

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