1.	Two solid rocket boosters provide the main thrust to lift the space shuttle off the launching pad. Each booster weighs approximately 1.92 × 105 pounds. Express this weight in standard form.
		A.	19,200 pounds	B.	192,000 pounds
		C.	19,200,000 pounds	D.	0.0000192 pounds
		Hint
	2.	Express 0.0000421 in scientific notation.
		A.	4.21 × 10-6	B.	4.21 × 10-4
		C.	4.21 × 10-5	D.	4.21 × 10-9
		Hint
	3.	Express 7.6109 × 108 in standard form.
		A.	0.000000076109	B.	7,610,900,000
		C.	76,109,000	D.	761,090,000
		Hint
	4.	Express 2,475,000 in scientific notation.
		A.	2.475 × 106	B.	2.475 × 105
		C.	2.475 × 103	D.	2.475 × 10-6
		Hint
	5.	Express 0.0000000139 in scientific notation.
		A.	1.39 × 108	B.	1.39 × 10-7
		C.	1.39 × 10-9	D.	1.39 × 10-8
		Hint