1.
Express 0.0000421 in scientific notation.
A.
4.21 × 10
-5
B.
4.21 × 10
-6
C.
4.21 × 10
-4
D.
4.21 × 10
-9
Hint
2.
Simplify (3
a
4
b
5
c
)
4
.
A.
81
a
16
b
20
c
4
B.
3
a
16
b
20
c
4
C.
7
a
16
b
20
c
4
D.
12
a
8
b
9
c
5
Hint
3.
Simplify
Assume the denominator is not equal to zero.
A.
B.
C.
D.
Hint
4.
Evaluate
. Express the result in scientific notation.
A.
8.0 × 10
-9
B.
80 × 10
-8
C.
8.0 × 10
-7
D.
0.8 × 10
-8
Hint
5.
Which number is not equal to the other three?
A.
B.
C.
2
-2
D.
Hint