1.	Express 45,280,000 in scientific notation.
		A.	4.528 × 106	B.	4.528 × 107
		C.	45.28 × 106	D.	4.528 × 10-7
		Hint
	2.	Express 0.091 in scientific notation.
		A.	9.1 × 101	B.	9.1 × 10-2
		C.	9.1 × 102	D.	9.1 × 10-1
		Hint
	3.	Simplify
		A.		B.
		C.		D.	5t3u3v4
		Hint
	4.	Express the result in scientific notation.
		A.	1.25 × 10-10	B.	1.25 × 1010
		C.	1.25 × 10-4	D.	1.25 × 104
		Hint
	5.	Simplify
		A.		B.
		C.	m	D.
		Hint