1.	Simplify x3y0z-2.
		A.		B.	0
		C.		D.	-x3yz2
		Hint
	2.	Simplify . Assume the denominator is not equal to zero.
		A.		B.
		C.		D.
		Hint
	3.	Express 765,000,000,000 in scientific notation.
		A.	7.65 × 1010	B.	7.65 × 10-11
		C.	7.65 × 1011	D.	0.765 × 1012
		Hint
	4.	Express 47.5 × 10-5 in scientific notation.
		A.	4.75 × 10-4	B.	475 × 10-6
		C.	4.75 × 10-6	D.	0.475 × 10-3
		Hint
	5.	Express 2.38 × 106 in standard notation.
		A.	238,000	B.	0.000000238
		C.	0.00000238	D.	2,380,000
		Hint