1.
Simplify
A.
B.
x
2
C.
x
4
D.
Hint
2.
Find the value of
a
if the graph of the exponential function
y
=
a
·
2
x
passes through the point
A
(3, 128).
A.
16
B.
4
C.
32
D.
8
Hint
3.
Solve 5
2
n
+3
< 25.
A.
n
< -1
B.
C.
n
> 1
D.
Hint
4.
Which of the following represents exponential decay?
A.
B.
C.
D.
Hint
5.
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