1.
Solve log
4
3 + log
4
x
= log
4
18.
A.
6
B.
54
C.
15
D.
12
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.
0.00032
C.
0.0013
D.
794.33
Hint
3.
Given that log
7
10
1.18, find log
7
1000.
A.
3.54
B.
3.85
C.
1.64
D.
2.54
Hint
4.
Use log
3
4
1.26 to approximate the value of log
3
108.
A.
3.78
B.
36
C.
2.38
D.
4.26
Hint
5.
Solve the equation 2 log
6
x
– log
6
5 = log
6
125.
A.
no solution
B.
–25
C.
312.5
D.
25
Hint