1.	Express 7-3 using positive exponents.
		A.		B.
		C.	(-7)3	D.
		Hint
	2.	Evaluate the expression 5n4m-2 if m = 6 and n = 3.
		A.		B.	-20
		C.	-5	D.
		Hint
	3.	Write 0.478 in scientific notation.
		A.	4.78 × 10-2
		B.	478 × 101
		C.	4.78 × 10-1
		D.	4.78 × 102
		Hint
	4.	How would 9.3 × 10-7 be written in standard form?
		A.	930,000,000
		B.	93,000,000
		C.	0.000000093
		D.	0.00000093
		Hint
	5.	Simplify the expression. –24x ÷ –4x-3
		A.		B.
		C.	6x4	D.
		Hint