1.	Find log 47.2 to four decimal places.
		A.	0.6739	B.	3.8544
		C.	2.0791	D.	1.6739
		Hint
	2.	Solve 32x -1 = 25.6 to three decimal places.
		A.	4.767	B.	0.739
		C.	1.204	D.	1.976
		Hint
	3.
		A.	±1.022	B.	1.648
		C.	1.022	D.	-2.266
		Hint
	4.	Express log 6 15 in terms of common logarithms.
		A.		B.
		C.		D.
		Hint
	5.	Suppose black coffee has a pH of 5 and milk of magnesia has a pH of 10. How many times more hydrogen ions are in black coffee than in milk of magnesia? (pH = –log[H+], where H+ is the substance's hydrogen ion concentration in moles per liter)
		A.	100,000 times	B.	5 times
		C.	2 times	D.	100 times
		Hint