1.	Write 2,564,000 in scientific notation.
		A.	2.564×106	B.	2.564×105
		C.	25.64×105	D.	2,564×103
		Hint
	2.	Evaluate the expression 5n4m-2 if m = 6 and n = 3.
		A.		B.	-5
		C.	-20	D.
		Hint
	3.	Simplify (3x3)4.
		A.	3x7	B.	27x7
		C.	12x12	D.	81x12
		Hint
	4.	Use your calculator to evaluate the expression. 7.3 × 1012 + 8.1 × 1012
		A.	15.4 × 1013	B.	5.913 × 1013
		C.	59.13	D.	1.54 × 1013
		Hint