1.
Find log 47.2 to four decimal places.
A.
0.6739
B.
2.0791
C.
3.8544
D.
1.6739
Hint
2.
Solve 4
x
= 22 to three decimal places.
A.
2.230
B.
3.961
C.
5.500
D.
3.414
Hint
3.
Solve 3
x
+ 4
= 7
x
- 1
to three decimal places.
A.
7.483
B.
-1.993
C.
2.397
D.
1.254
Hint
4.
Solve 6
2x
> 5
x
+ 2
.
A.
x
> 1.63
B.
x
> 0.82
C.
x
> 0.85
D.
x
> 1.82
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.
5 times
B.
100 times
C.
2 times
D.
100,000 times
Hint