1.	If and , find the approximate value of log2 15.
		A.	1.4649	B.	3.6802
		C.	3.9069	D.	0.7369
		Hint
	2.	Solve log3 (x + 4) - log3 (x - 2) = 2 log3 2.
		A.	8	B.	9
		C.	6	D.	4
		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.	0.00032	B.	794.33
		C.	0.00068	D.	0.0013
		Hint
	4.	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.	1.84
		C.	16	D.	1.11
		Hint
	5.	Solve the equation 2 log 6 x – log 6 5 = log 6 125.
		A.	312.5	B.	–25
		C.	no solution	D.	25
		Hint