1.
Simplify
Assume the denominator is not equal to zero.
A.
B.
C.
D.
Hint
2.
Evaluate (3.2 × 10
-5
)(5.4 × 10
9
). Express the result in scientific notation.
A.
17.28 × 10
4
B.
0.1728 × 10
6
C.
1.728 × 10
5
D.
1.728 × 10
3
Hint
3.
Find
.
A.
14
B.
-14
C.
-15
D.
15
Hint
4.
Solve the equation
x
2
= 0.81.
A.
x
= 0.9 or
x
= -0.9
B.
x
= -0.9 only
C.
none of these is correct
D.
x
= 0.9 only
Hint
5.
Use the following table to find the population of bacteria in hour
n
.
A.
180,000
n
B.
6 × 30,000
n
C.
30,000 × 6
6
D.
30,000
6
n
Hint
6.
The population of fish in Mark's lake is 500 this year. If the population increases by 6.9% a year, what number can Mark multiply this year's population by to estimate the fish population in the lake next year?
A.
0.0931
B.
1.069
C.
1.69
D.
6.9
Hint