1.	Which pair of vectors is perpendicular?
		A.	,	B.	,
		C.	,	D.	,
		Hint
	2.	Find the inner product of and if and .
		A.	14	B.	-12
		C.	-14	D.	-8
		Hint
	3.	The cross product of two vectors is _______.
		A.	parallel to both vectors	B.	not a vector
		C.	a dot product	D.	perpendicular to both vectors
		Hint
	4.	Find if and .
		A.	5	B.
		C.	-8	D.
		Hint
	5.	Which pair of vectors is perpendicular?
		A.		B.
		C.		D.
		Hint