21. What is the
standard form of
9.12 × 106?
24. How is 57,900,000
written in scientific
notation?
A. 912,000,000
A. 5.79 × 108
B. 91,200,000
B. 5.79 × 107
C. 9,120,000
C. 5.79 × 10
D. 912,000
D. 5.79 × 105
22. The average depth
of an ocean is
approximately 1.2
× 104 feet. How is
this depth written
in standard form?
A. 120,000 feet
B. 12,000 feet
C. 1,200 feet
D. 120 feet
23. A speck of dust
has a diameter of
675 ten-millionths
centimeters. How
is this diameter
expressed in
scientific notation?
A. 6.75 × 10–4
centimeters
B. 6.75 × 10–5
centimeters
C. 6.75 × 10–6
centimeters
D. 6.75 × 10–7
centimeters
6
25. The mass of two
objects is being
compared during a
physics experiment.
It is determined that
object A has a mass
of
and object
B has a mass of
How many
times larger is the
mass of object A
than the mass of
object B?
A. 0.1
B. 0.4
D. 40
C. 10
B. 8
C. 30
D. 80
27. The measure of a
virus is 0.000085
cm. How is the
measure of the
virus written
in scientific
notation?
A. 8.5 × 105
B. 8.5 × 10–4
C. 8.5 × 10-5
28. A book is about
9.3 × 10–2 meters
thick. A bookshelf
is about 1.865 ×
101 meters long.
About how many
copies of this book
will fit on the
bookshelf?
A. 17 books
26. A field is 1.2 x 103
yards long. A
garden in the field
is 0.4 x 102 yards
long. How many
times shorter is
the length of the
garden than the
length of the field?
A. 3
B. 20 books
C. 200 books
D. 498 books
29. A company had 21
billion dollars in
sales last year.
What are the sales
of the company
written in scientific
notation?
A. 2.1 × 107
B. 2.1 × 109
C. 2.1 × 1010
30. What is the
standard form of
4.63 × 104 ?
A. 4,630
B. 46,300
C. 463,000
D. 4,630,000
31. The populations of
two towns, town A
and town B, are
being compared. The
population of town A
is
and the
population of B is
How many
times greater is the
population of town B
than town A?
distance be written
in standard form?
A 778,400,000,00
. 0 km
B. 7,784,000,000
km
C. 778,400,000
km
States. How is the
number of books
sold written in
scientific notation?
A. 3.1 × 106
B. 3.1 × 107
C. 3.1 × 108
D. 3.1 × 109
D. 77,840,000 km
33. What is 6.7 ×
0.00065 expressed
in scientific
notation?
A. 4.355 × 10–3
B. 4.355 × 10–2
C. 4.355 × 103
D. 4.355 × 106
34. A microgram is equal
36. The average distance
of Mercury from the
Sun is
about
kilometers (km). The
average distance of
Jupiter from the Sun
is about 13 times the
distance of Mercury
from the Sun. What
is the
approximate average
distance of Jupiter
from the Sun, in km?
to
grams.
How many times
greater than a
A.
A. 0.2
microgram is
grams?
B.
B. 0.5
A.
C.
B.
D.
C. 2
D. 5
C.
32 The average
. distance from
Jupiter to the Sun
is about 7.784 ×
108 km. How
should this
D.
35. In 2005, about 3.1
billion books were
sold in the United