1.
Find the value of
a
if the graph of the exponential function
y
=
a
·
2
x
passes through the point
A
(3, 128).
A.
8
B.
4
C.
16
D.
32
Hint
2.
Solve 5
2
n
+3
< 25.
A.
B.
C.
n
> 1
D.
n
< -1
Hint
3.
Which of the following represents exponential decay?
A.
B.
C.
D.
Hint
4.
The number of bacteria in a culture grew exponentially. When the experiment began, there were 100,000. Ten minutes later, that number grew to 220,000. Which of the following equations could be used to model this situation?
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