1.
The rule for multiplying by powers of 10 states that if the exponent of the 10 is positive, then you move the decimal point __________.
A.
to the left by the same number of spaces as the number in the exponent
B.
to the right by the number of spaces as the number in the exponent plus 1
C.
to the right by the same number of spaces as the number in the exponent
D.
to the right by the number of spaces as the number in the exponent minus 1
Hint
2.
Which is the correct definition for a number expressed in scientific notation?
A.
A number is expressed in scientific notation when it is in the form
a
× 10
n
, where
and
n
is an integer.
B.
A number is expressed in scientific notation when it is in the form
a
× 10
n
, where
and
n
is an integer.
C.
A number is expressed in scientific notation when it is in the form
a
× 10
n
, where
and
n
is a whole number.
D.
A number is expressed in scientific notation when it is in the form
a
× 10
n
, where
and
n
is a whole number.
Hint
3.
The speed of light is about 3 × 10
8
meters per second. How far would a beam of light travel in 5 seconds? Express the answer in scientific notation.
A.
1.5 × 10
10
m
B.
1.5 × 10
9
m
C.
1.5 × 10
5
m
D.
1.5 × 10
6
m
Hint
4.
Express 8 micrograms in scientific notation.
A.
8 × 10
6
grams
B.
8 × 10
-6
grams
C.
8 × 10
9
grams
D.
8 × 10
-9
grams
Hint
5.
Evaluate the expression
.
A.
4,000
B.
40,000
C.
0.004
D.
0.0004
Hint