1.
Write the expression 4 · 4 · 4 · 4 · 4 using exponents.
A.
5
5
B.
5
4
C.
4
4
D.
4
5
Hint
2.
Solve
x
= 3
4
.
A.
x
= 64
B.
x
= 12
C.
x
= 81
D.
x
= 27
Hint
3.
Express 130,254 in expanded form.
A.
(1 × 10
5
) + (3 × 10
4
) + (2 × 10
3
) + (5 × 10
2
) + (4 × 10
1
)
B.
(1 × 10
5
) + (3 × 10
4
) + (2 × 10
2
) + (5 × 10
1
) + (4 × 10
0
)
C.
(1 × 10
5
) + (30 × 10
4
) + (2 × 10
2
) + (5 × 10
1
) + (4 × 10
0
)
D.
(1 × 10
6
) + (3 × 10
5
) + (2 × 10
3
) + (5 × 10
2
) + (4 × 10
1
)
Hint
4.
Write 3 ·
x
·
x
·
x
·
x
·
y
·
y
·
y
·
y
using exponents.
A.
3
x
4
y
4
B.
3
xy
8
C.
3
4
x
4
y
4
D.
3>
x
4
y
3
Hint
5.
Evaluate 7(
a
–
b
)
3
if
a
= 3 and
b
= 1.
A.
28
B.
42
C.
56
D.
8
Hint