1.	Find the inner product of and if and .
		A.	-12	B.	12
		C.	20	D.	-20
		Hint
	2.	Which pair of vectors is perpendicular?
		A.	,	B.	,
		C.	,	D.	,
		Hint
	3.	The cross product of two vectors is _______.
		A.	a dot product	B.	parallel to both vectors
		C.	perpendicular to both vectors	D.	not a vector
		Hint
	4.	Which pair of vectors is perpendicular?
		A.		B.
		C.		D.
		Hint
	5.	Find if and .
		A.		B.
		C.		D.
		Hint