1.
Solve 3
2
x
-1
= 25.6 to three decimal places.
A.
1.976
B.
0.739
C.
4.767
D.
1.204
Hint
2.
Solve 3
x
+ 4
= 7
x
- 1
to three decimal places.
A.
7.483
B.
1.254
C.
-1.993
D.
2.397
Hint
3.
Solve 6
2x
> 5
x
+ 2
.
A.
x
> 1.82
B.
x
> 1.63
C.
x
> 0.85
D.
x
> 0.82
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.
5 times
B.
2 times
C.
100 times
D.
100,000 times
Hint