Name _______________________________________ Date __________________ Class _________________
LESSON
5-2
Practice B
Ratios, Rates, and Unit Rates
1. Copper weighing 4480 kilograms has a volume of 0.5 cubic
meters. What is the density of copper?
________________________________________________________________________________________
2. Yoshi’s yogurt contains 15 calories per ounce. How many
calories are in an 8-ounce container of Yoshi’s yogurt?
________________________________________________________________________________________
3. Emily earns $7.50 per hour. How much does she earn in
3 hours?
________________________________________________________________________________________
4. An antelope can run 152.5 miles in 2.5 hours. What is average
speed of the antelope?
________________________________________________________________________________________
5. Bob and Marquis went on a trip. The first day, they drove 465
miles in 8 hours. What is their average speed for the first day of
their trip?
________________________________________________________________________________________
6. A racecar was attempting to set a record. The racecar went 1000
feet in 4.5 seconds. To the nearest tenth, what is the average
speed of the racecar?
________________________________________________________________________________________
Tell which is the better buy.
7. 8.2 oz of toothpaste for $2.99 or 6.4 oz of toothpaste for $2.49
________________________________________________________________________________________
8. a 3 lb bag of apples for $2.99 or a 5 lb bag of apples for $4.99
________________________________________________________________________________________
9. 16 oz bottle of soda for $1.25 or 20 oz bottle of soda for $1.55
________________________________________________________________________________________
10. Mavis rides the bus every day. She bought a bus pass good for
the month of October for $38.75. How much was Mavis charged
per day for the bus pass?
________________________________________________________________________________________
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14
Holt McDougal Mathematics
19. Yes, the ratio
Reading Strategies
12
3
is equivalent to .
16
4
1. 1 to 3, 1:3, or
Review for Mastery
4
48
1.
;
10 120
2. 1:3, 1 to 3,
3
150
2. 25; ; 2;
4
200
3–6. Possible answers given.
3.
2 18
,
3 27
12 8
,
30 20
7. yes
5.
4.
3 9
,
9 27
2
.
3
b.
915 kg
m3
3. $35
5. 2 blocks/minute
b
d
=
a
c
5
3
17
18
5. B
1.
3.
5.
7.
8.
9.
10.
2. yes
78
23
6. H
7. A
8. H
4. 50 mi/h
6. 4 mi/h
Practice B
a!b
c !d
=
b
d
4.
2. 12 mi
7. 8 oz for $0.50
8. $9 to deliver a 2 lb package
9. 16 oz jar for $1.79
a+b
c+d
=
b
d
3.
1 9
,
3 27
1.
Problem Solving
1. no
4. Possible answers:
Practice A
!1
c. yes; each ratio is equivalent to
3
d.
1 12
,
3 36
LESSON 5-2
9 12
=
; yes, since each ratio is
6
8
3
equivalent to
2
2. a.
3. a. yes; each ratio is equivalent to
3. Possible answers:
1. T
2. H
3. E
4. A
5. N
6. S
7. W
8. E
9. R
10. S
T H E A N S W E R S
8 4
,
10 5
8. no
Challenge
b.
1
3
Puzzles, Twister & Teasers
6.
1. Both ratios are equivalent to
1
3
8960 kg
2. 120 calories
m3
$22.50
4. 61 mi/h
58.125 mi/h
6. 222.2 ft/sec
8.2 oz for $2.99
3 lb bag for $2.99
20 oz bottle for $1.55
$1.25
Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.
77
Holt McDougal Mathematics