1.
If
and
, find the approximate value of log
2
15.
A.
3.9069
B.
0.7369
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
7
10
1.18, find log
7
1000.
A.
1.64
B.
3.85
C.
2.54
D.
3.54
Hint
4.
Use the fact that log
5
8
1.29 and log
5
10
1.43 to approximate the value of log
5
80.
A.
16
B.
1.84
C.
1.11
D.
2.72
Hint
5.
Solve the equation 2 log
6
x
– log
6
5 = log
6
125.
A.
25
B.
no solution
C.
–25
D.
312.5
Hint