1.
Simplify
A.
B.
C.
3
15
D.
15
Hint
2.
Simplify
A.
B.
y
30
C.
y
3
D.
Hint
3.
Find the value of
a
if the graph of the exponential function
y
=
a
·
2
x
passes through the point
A
(3, 128).
A.
4
B.
32
C.
16
D.
8
Hint
4.
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.
9
C.
D.
-3
Hint
5.
Solve 2
x
+4
= 2
2
x
+5
.
A.
-1
B.
-3
C.
-4
D.
-2
Hint