1.	Express 7,000,000,000 in scientific notation.
		A.	7 × 1012	B.	7 × 108
		C.	7 × 106	D.	7 × 109
		Hint
	2.	Simplify 24 · 23.
		A.	47	B.	21 or 2
		C.	27	D.	212
		Hint
	3.	Express 7.6109 × 108 in standard form.
		A.	76,109,000	B.	7,610,900,000
		C.	0.000000076109	D.	761,090,000
		Hint
	4.	Express 3.157 ×10-4 in standard form.
		A.	31,570	B.	0.003157
		C.	0.00003157	D.	0.0003157
		Hint
	5.	Find 93 · 97.
		A.	921	B.	910
		C.	8110	D.	8121
		Hint