1.	Solve log4 3 + log4 x = log4 18.
		A.	12	B.	54
		C.	15	D.	6
		Hint
	2.	Solve log5 ( x + 2) + log5 ( 2x - 1) = 2.
		A.	no solution	B.	3
		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.	0.0013	B.	0.00068
		C.	794.33	D.	0.00032
		Hint
	4.	Use log 3 4 1.26 to approximate the value of log 3 108.
		A.	2.38	B.	36
		C.	4.26	D.	3.78
		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.	2.72	B.	16
		C.	1.11	D.	1.84
		Hint