What is the dot product of and ?

Answer and explanation

Correct answer: D. 15

  1. Step 1: Compute the scalar product using the component formula .
  2. Step 2: Insert the respective components of and .
  3. Step 3: Adding the component products gives .
Answer
15.
Why not the others: -15 reverses the sign of the scalar dot product; 10 is an underestimation arithmetic miscalculation; 18 is an overestimation arithmetic miscalculation.

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