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Math Help - Dot product

  1. #1
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    Dot product

    just want to make sure im doing this right

    Given the vectors A = 10i +4j, B = 3i −2j +5k
    (a) A B

    (10)(3)+(-2)(4)+(5)(0)=22
    or is it
    (10)/(3)+(-2)(4)+5=27

    just didn't know if i would multiply by zero or not
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  2. #2
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    It is (10)(3)+(-2)(4)+(5)(0)=22
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  3. #3
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    ok thanks just wanted to make sure would hate to make mistake like that
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