1.
What is the degree of 42
x
5
y
2
z
?
A.
7
B.
8
C.
5
D.
2
Hint
2.
Simplify (-3
a
5
b
3
)
4
.
A.
81
a
20
b
12
B.
-12
a
9
b
7
C.
-12
a
20
b
12
D.
-81
a
9
b
12
Hint
3.
Solve 5
2
n
+3
< 25.
A.
n
> 1
B.
n
< -1
C.
D.
Hint
4.
Evaluate
.
A.
log (
x
- 3)
B.
5 log
5
(
x
- 3)
C.
log
25
(
x
- 3)
D.
x
- 3
Hint
5.
Solve log
2
(
x
+ 4) = log
2
(
x
2
+ 2).
A.
no solution
B.
2
C.
-1, 2
D.
0
Hint
6.
Solve 3
2
x
-1
= 25.6 to three decimal places.
A.
0.739
B.
4.767
C.
1.204
D.
1.976
Hint
7.
Paleontology
A fossil is found that contains 10% of the amount of carbon-14 found in a living being. About how old is the fossil?
A.
20,700 years
B.
15,300 years
C.
19,200 years
D.
17,600 years
Hint
8.
Suppose that the wealth of a business owner is increasing exponentially. In 1993, he had $40 million. In 2001, he had $55 million. How much money will he have in 2010?
A.
$20.3 million
B.
$57.2 million
C.
$78.7 million
D.
$28.0 million
Hint
9.
Given that log
7
10
1.18, find log
7
1000.
A.
2.54
B.
3.54
C.
1.64
D.
3.85
Hint
10.
Solve 6
2x
> 5
x
+ 2
.
A.
x
> 1.82
B.
x
> 0.85
C.
x
> 0.82
D.
x
> 1.63
Hint