1.   Find the inner product of and if and .
    A. 12 B. 20
    C. -12 D. -20
    Hint

  2.   Which pair of vectors is perpendicular?
    A. , B. ,
    C. , D. ,
    Hint

  3.   Two vectors and are perpendicular if ________.
    A. their inner product is v1w1 +v2w2
    B. their inner product equals zero
    C. their dot product is equal to their cross product
    D. their cross product equals zero
    Hint

  4.   Find if and .
    A. 5 B.
    C. D. -8
    Hint

  5.   Which pair of vectors is perpendicular?
    A. B.
    C. D.
    Hint



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