1.
Simplify
A.
B.
3
15
C.
15
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.
32
C.
8
D.
4
Hint
3.
Solve 2
x
+4
= 2
2
x
+5
.
A.
-3
B.
-1
C.
-2
D.
-4
Hint
4.
Solve 5
2
n
+3
< 25.
A.
n
> 1
B.
C.
D.
n
< -1
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.
$28.0 million
C.
$78.7 million
D.
$57.2 million
Hint