1.
Express 0.0000421 in scientific notation.
A.
4.21 × 10
-9
B.
4.21 × 10
-4
C.
4.21 × 10
-5
D.
4.21 × 10
-6
Hint
2.
Simplify (7
a
4
b
) (8
a
7
b
6
).
A.
56
a
28
b
6
B.
15
a
11
b
7
C.
56
a
11
b
7
D.
15
a
28
b
6
Hint
3.
Simplify
Assume the denominator is not equal to zero.
A.
B.
C.
D.
Hint
4.
Evaluate (3.2 × 10
-5
)(5.4 × 10
9
). Express the result in scientific notation.
A.
1.728 × 10
3
B.
1.728 × 10
5
C.
17.28 × 10
4
D.
0.1728 × 10
6
Hint
5.
Use an exponent to write 177,147 as a power of 3.
A.
3
17
B.
3
11
C.
3
9
D.
3
19
Hint