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.
1.728 × 10
3
C.
0.1728 × 10
6
D.
1.728 × 10
5
Hint
3.
Find
.
A.
15
B.
14
C.
-15
D.
-14
Hint
4.
Solve the equation
x
2
= 0.81.
A.
x
= 0.9 or
x
= -0.9
B.
none of these is correct
C.
x
= 0.9 only
D.
x
= -0.9 only
Hint
5.
Suppose your parents buy a new car for $21,000. What will the value of the car be in 5 years if the car depreciates by 10% each year.?
A.
$12,400
B.
$10,044
C.
$15,309
D.
$11,160
Hint
6.
Which equation represents exponential growth?
A.
y
= 250 ·
x
B.
y
= 250 × 0.25
x
C.
y
= 250 × 4
x
D.
y
= 250 × 0.4
c
Hint