1.	If and , find the approximate value of log2 15.
		A.	0.7369	B.	3.6802
		C.	3.9069	D.	1.4649
		Hint
	2.	Solve log4 3 + log4 x = log4 18.
		A.	6	B.	15
		C.	12	D.	54
		Hint
	3.	Solve log3 (x + 4) - log3 (x - 2) = 2 log3 2.
		A.	6	B.	8
		C.	9	D.	4
		Hint
	4.	Solve log5 ( x + 2) + log5 ( 2x - 1) = 2.
		A.		B.	3
		C.	, 3	D.	no solution
		Hint
	5.	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.	0.00032	B.	794.33
		C.	0.0013	D.	0.00068
		Hint