1.	Express 7-3 using positive exponents.
		A.		B.
		C.	(-7)3	D.
		Hint
	2.	Write 0.478 in scientific notation.
		A.	4.78 × 10-1
		B.	478 × 101
		C.	4.78 × 10-2
		D.	4.78 × 102
		Hint
	3.	How would 9.3 × 10-7 be written in standard form?
		A.	0.000000093
		B.	930,000,000
		C.	93,000,000
		D.	0.00000093
		Hint
	4.	Evaluate the expression.–2-4
		A.		B.
		C.		D.	–16
		Hint
	5.	Simplify the expression.–4x × 4x8
		A.	–16x8	B.	–8x8
		C.	–8x9	D.	–16x9
		Hint