1.	Solve log4 3 + log4 x = log4 18.
		A.	6	B.	15
		C.	12	D.	54
		Hint
	2.	Solve log5 ( x + 2) + log5 ( 2x - 1) = 2.
		A.	, 3	B.	no solution
		C.		D.	3
		Hint
	3.	Chemistry The pH of a solution and the concentration [H+] of hydrogen ions in the solution are related by the formula . Find the concentration of hydrogen ions in a solution with a pH of 2.9.
		A.	0.00068	B.	0.00032
		C.	0.0013	D.	794.33
		Hint
	4.	Given that log710 1.18, find log7 1000.
		A.	2.54	B.	1.64
		C.	3.85	D.	3.54
		Hint
	5.	Use the fact that log 5 8 1.29 and log 5 10 1.43 to approximate the value of log 5 80.
		A.	1.11	B.	1.84
		C.	16	D.	2.72
		Hint