1.	Express 7-3 using positive exponents.
		A.		B.
		C.		D.	(-7)3
		Hint
	2.	Evaluate the expression 5n4m-2 if m = 6 and n = 3.
		A.	-5	B.	-20
		C.		D.
		Hint
	3.	Write the expression 5-4 using a positive exponent.
		A.		B.	54
		C.	-54	D.
		Hint
	4.	Write as an expression using a negative exponent.
		A.		B.
		C.	2-6	D.	-26
		Hint
	5.	Evaluate x-4 if x = 3.
		A.		B.	81
		C.		D.	-81
		Hint