1.	Write using negative exponents.
		A.	2-4	B.	2-3
		C.	-24	D.	-2-4
		Hint
	2.	Write 0.478 in scientific notation.
		A.	4.78 × 102
		B.	4.78 × 10-1
		C.	478 × 101
		D.	4.78 × 10-2
		Hint
	3.	Simplify (3x3)4.
		A.	81x12	B.	27x7
		C.	3x7	D.	12x12
		Hint
	4.	Simplify the expression.–4x × 4x8
		A.	–16x9	B.	–16x8
		C.	–8x8	D.	–8x9
		Hint
	5.	Simplify the expression. –24x ÷ –4x-3
		A.		B.
		C.	6x4	D.
		Hint