1.
Find log 47.2 to four decimal places.
A.
2.0791
B.
0.6739
C.
1.6739
D.
3.8544
Hint
2.
A.
1.648
B.
-2.266
C.
1.022
D.
±1.022
Hint
3.
Solve 3
x
+ 4
= 7
x
- 1
to three decimal places.
A.
1.254
B.
2.397
C.
7.483
D.
-1.993
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.
2 times
C.
100 times
D.
5 times
Hint