1.   Find the inner product of and if and .
    A. -12 B. 14
    C. -8 D. -14
    Hint

  2.   Find if and .
    A. B.
    C. D.
    Hint

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

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

  5.   Evaluate if and .
    A. 60 B. 21
    C. -39 D. 44
    Hint