1.	Write a2b-3 using positive exponents.
		A.		B.
		C.		D.
		Hint
	2.	Write using negative exponents.
		A.	2-4	B.	2-3
		C.	-2-4	D.	-24
		Hint
	3.	Write the expression 5-4 using a positive exponent.
		A.		B.
		C.	-54	D.	54
		Hint
	4.	Write the expression m-7 using a positive exponent.
		A.	m7	B.
		C.		D.	-m7
		Hint
	5.	Evaluate x-4 if x = 3.
		A.	-81	B.
		C.	81	D.
		Hint