1.
If
and
, find the approximate value of log
2
15.
A.
0.7369
B.
3.9069
C.
1.4649
D.
3.6802
Hint
2.
Chemistry
The pH of a solution and the concentration [H
+
] of hydrogen ions in the solution are related by the formula
. Find the concentration of hydrogen ions in a solution with a pH of 2.9.
A.
0.00068
B.
794.33
C.
0.00032
D.
0.0013
Hint
3.
Given that log
8
10
1.11 and log
8
60
1.97, find log
8
6.
A.
1.77
B.
1.16
C.
0.86
D.
3.08
Hint
4.
Use log
3
4
1.26 to approximate the value of log
3
108.
A.
2.38
B.
36
C.
3.78
D.
4.26
Hint
5.
Solve the equation 2 log
6
x
– log
6
5 = log
6
125.
A.
–25
B.
25
C.
no solution
D.
312.5
Hint