1.
Find log 47.2 to four decimal places.
A.
3.8544
B.
2.0791
C.
1.6739
D.
0.6739
Hint
2.
Find log 136.8 to four decimal places.
A.
2.0502
B.
2.1361
C.
2.1418
D.
2.1106
Hint
3.
Solve 4
x
= 22 to three decimal places.
A.
3.414
B.
2.230
C.
5.500
D.
3.961
Hint
4.
Solve 3
2
x
-1
= 25.6 to three decimal places.
A.
0.739
B.
1.976
C.
1.204
D.
4.767
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.
2 times
B.
100 times
C.
100,000 times
D.
5 times
Hint