1.
Express 0.091 in scientific notation.
A.
9.1 × 10
-1
B.
9.1 × 10
-2
C.
9.1 × 10
2
D.
9.1 × 10
1
Hint
2.
What is the degree of 42
x
5
y
2
z
?
A.
8
B.
7
C.
5
D.
2
Hint
3.
Simplify (18
q
3
r
)(2
q
r
4
).
A.
36
q
r
B.
36
q
3
r
5
C.
36
q
3
r
4
D.
36
q
4
r
5
Hint
4.
Simplify
A.
k
17
B.
k
-3
C.
k
3
D.
Hint
5.
Simplify (-3
a
5
b
3
)
4
.
A.
-12
a
9
b
7
B.
-81
a
9
b
12
C.
81
a
20
b
12
D.
-12
a
20
b
12
Hint