1.
Simplify
A.
x
2
B.
C.
D.
x
4
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.
32
B.
8
C.
16
D.
4
Hint
3.
Find the value of
a
if the graph of the exponential function
y
=
a
·
3
x
passes through the point
B
(2, -3).
A.
3
B.
C.
9
D.
-3
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.
$78.7 million
C.
$28.0 million
D.
$57.2 million
Hint