1.	Express 7,000,000,000 in scientific notation.
		A.	7 × 106	B.	7 × 108
		C.	7 × 109	D.	7 × 1012
		Hint
	2.	Express 7.6109 × 108 in standard form.
		A.	7,610,900,000	B.	76,109,000
		C.	0.000000076109	D.	761,090,000
		Hint
	3.	Express 0.0000000139 in scientific notation.
		A.	1.39 × 10-7	B.	1.39 × 108
		C.	1.39 × 10-9	D.	1.39 × 10-8
		Hint
	4.	Write 4.06 × 10-4 in standard form.
		A.	0.00406	B.	40,600
		C.	4,060	D.	0.000406
		Hint
	5.	The amount of corn produced by the major corn-producing countries is given in the table. Order the countries according to the amount of corn produced from greatest to least.
		A.	United States, China, Brazil, Mexico, France	B.	France, Mexico, Brazil, China, United States
		C.	Brazil, Mexico, France, United States, China	D.	Brazil, United States, Mexico, France, China
		Hint