1.	Express 0.0000421 in scientific notation.
		A.	4.21 × 10-9	B.	4.21 × 10-5
		C.	4.21 × 10-4	D.	4.21 × 10-6
		Hint
	2.	Express 7.6109 × 108 in standard form.
		A.	761,090,000	B.	0.000000076109
		C.	7,610,900,000	D.	76,109,000
		Hint
	3.	Express 0.0000000139 in scientific notation.
		A.	1.39 × 108	B.	1.39 × 10-8
		C.	1.39 × 10-9	D.	1.39 × 10-7
		Hint
	4.	Write 0.0000055 in scientific notation.
		A.	55 × 107	B.	5.5 × 10-6
		C.	55 × 10-7	D.	5.5 × 106
		Hint
	5.	The population of five cities in California is given in the table. Order the cities according to the population from least to greatest
		A.	Long beach, San Francisco, San Jose, San Diego, Los Angeles	B.	Los Angeles, San Diego, San Jose, San Francisco, Long Beach
		C.	San Diego, Los Angeles, San Diego, San Francisco, San Jose	D.	San Diego, Los Angles, Long Beach, San Francisco, San Jose
		Hint