1.	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.	2.2 × 10-5
		D.	0.22 × 10-4
		Hint
	2.	Simplify (3x3)4.
		A.	27x7	B.	12x12
		C.	81x12	D.	3x7
		Hint
	3.	Evaluate the expression.–2-4
		A.		B.
		C.		D.	–16
		Hint
	4.	Simplify the expression.–4x × 4x8
		A.	–16x9	B.	–8x8
		C.	–8x9	D.	–16x8
		Hint
	5.	Simplify the expression. –24x ÷ –4x-3
		A.		B.
		C.	6x4	D.
		Hint