1.
Which symbol makes the following statement true?
3.25 × 10
3
______ 325
A.
=
B.
C.
>
D.
<
Hint
2.
Express 0.0000421 in scientific notation.
A.
4.21 × 10
-6
B.
4.21 × 10
-5
C.
4.21 × 10
-9
D.
4.21 × 10
-4
Hint
3.
Simplify (7
a
4
b
) (8
a
7
b
6
).
A.
56
a
11
b
7
B.
56
a
28
b
6
C.
15
a
28
b
6
D.
15
a
11
b
7
Hint
4.
Evaluate (3.2 × 10
-5
)(5.4 × 10
9
). Express the result in scientific notation.
A.
1.728 × 10
3
B.
0.1728 × 10
6
C.
17.28 × 10
4
D.
1.728 × 10
5
Hint
5.
Which number is not equal to the other three?
A.
B.
2
-2
C.
D.
Hint