1.	Express 7-3 using positive exponents.
		A.	(-7)3	B.
		C.		D.
		Hint
	2.	How would 9.3 × 10-7 be written in standard form?
		A.	0.000000093
		B.	0.00000093
		C.	93,000,000
		D.	930,000,000
		Hint
	3.	The diameter of a volcanic particle averaged 0.000022 meter. What is this measure written in scientific notation?
		A.	2.2 × 10
		B.	2.2 × 105
		C.	0.22 × 10-4
		D.	2.2 × 10-5
		Hint
	4.	Evaluate the expression.–2-4
		A.	–16	B.
		C.		D.
		Hint
	5.	Simplify the expression. –24x ÷ –4x-3
		A.	6x4	B.
		C.		D.
		Hint