1.
Simplify (3
a
4
b
5
c
)
4
.
A.
12
a
8
b
9
c
5
B.
7
a
16
b
20
c
4
C.
3
a
16
b
20
c
4
D.
81
a
16
b
20
c
4
Hint
2.
Evaluate
. Express the result in scientific notation.
A.
8.0 × 10
-7
B.
80 × 10
-8
C.
8.0 × 10
-9
D.
0.8 × 10
-8
Hint
3.
Use an exponent to write 177,147 as a power of 3.
A.
3
11
B.
3
17
C.
3
19
D.
3
9
Hint
4.
Tell whether the statement is
sometimes true, always true
, or
never true
for positive values of
n
. If it is sometimes true, state for what value it is true.
4
n
= 6,561.
A.
sometimes true,
n
= 8
B.
never true
C.
sometimes true,
n
= 7
D.
always true
Hint
5.
Which number is not equal to the other three?
A.
2
-2
B.
C.
D.
Hint