Pre-Algebra Chapter 6 - Ramsey School District
Pre-Algebra Chapter 6 - Ramsey School District
Pre-Algebra Chapter 6 - Ramsey School District
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Practice and Apply<br />
Homework Help<br />
For<br />
Exercises<br />
See<br />
Examples<br />
16–27 1, 2<br />
28–37 3<br />
38–45 4<br />
46, 47 3<br />
Extra Practice<br />
See page 736.<br />
Express each ratio as a fraction in simplest form.<br />
16. 6 ladybugs out of 27 insects 17. 14 girls to 35 boys<br />
18. 18 cups to 45 cups 19. 12 roses out of 28 flowers<br />
20. 7 cups to 9 pints 21. 9 pounds to 16 tons<br />
22. 11 gallons to 11 quarts 23. 18 miles to 18 yards<br />
24. 15 dollars out of 123 dollars 25. 17 rubies out of 118 gems<br />
26. 155 apples to 75 oranges 27. 321 articles in 107 magazines<br />
Express each ratio as a unit rate. Round to the nearest tenth, if necessary.<br />
28. $3 for 6 cans of tuna 29. $0.99 for 10 pencils<br />
30. 140 miles on 6 gallons 31. 68 meters in 15 seconds<br />
32. 19 yards in 2.5 minutes 33. 25 feet in 3.2 hours<br />
34. 236.7 miles in 4.5 days 35. 331.5 pages in 8.5 weeks<br />
36. MAGAZINES Which costs more per issue, an 18-issue subscription for<br />
$40.50 or a 12-issue subscription for $33.60? Explain.<br />
37. SHOPPING Determine which is less expensive per can, a 6-pack of soda<br />
for $2.20 or a 12-pack of soda for $4.25. Explain.<br />
Convert each rate using dimensional analysis.<br />
38. 45 mi/h ft/s 39. 18 mi/h ft/s<br />
40. 26 cm/s m/min 41. 32 cm/s m/min<br />
42. 2.5 qt/min gal/h 43. 4.8 qt/min gal/h<br />
44. 4 c/min qt/h 45. 7 c/min qt/h<br />
46. POPULATION Population density<br />
is a unit rate that gives the number<br />
of people per square mile. Find<br />
the population density for each<br />
state listed in the table at the right.<br />
Round to the nearest whole<br />
number.<br />
State<br />
Population Area<br />
(2000) (sq mi)<br />
Alaska 626,932 570,374<br />
New York 18,976,457 47,224<br />
Rhode Island 1,048,319 1045<br />
Texas 20,851,820 261,914<br />
Wyoming 493,782 97,105<br />
Population<br />
In 2000, the population<br />
density of the United<br />
States was about<br />
79.6 people per<br />
square mile.<br />
Source: The World Almanac<br />
Source: U.S. Census Bureau<br />
Online Research Data Update How has the population<br />
density of the states in the table changed since 2000? Visit<br />
www.pre-alg.com/data_update to learn more.<br />
TRAVEL For Exercises 47 and 48, use the following information.<br />
An airplane flew from Boston to Chicago to Denver. The distance from Boston<br />
to Chicago was 1015 miles and the distance from Chicago to Denver was<br />
1011 miles. The plane traveled for 3.5 hours and carried 285 passengers.<br />
47. About how fast did the airplane travel?<br />
48. Suppose it costs $5685 per hour to operate the airplane. Find the cost per<br />
person per hour for the flight.<br />
www.pre-alg.com/self_check_quiz<br />
Lesson 6-1 Ratios and Rates 267
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