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 />
13–26 1<br />
27–35 2<br />
39, 40 3<br />
Extra Practice<br />
See page 738.<br />
Find the percent of each number mentally.<br />
13. 50% of 28 14. 75% of 16 15. 60% of 55<br />
16. 20% of 105 17. 87 1 2 % of 56 18. 162 % of 42<br />
3<br />
19. 12 1 2 % of 32 20. 662 % of $24<br />
3<br />
21. 200% of 45<br />
22. 150% of 54 23. 125% of 300 24. 175% of 200<br />
MONEY For Exercises 25 and 26, use the following information.<br />
In a recent year, the number of $1 bills in circulation in the United States was<br />
about 7 billion.<br />
25. Suppose the number of $5 bills in circulation was 25% of the number of<br />
$1 bills. About how many $5 bills were in circulation?<br />
26. If the number of $10 bills was 20% of the number of $1 bills, about how<br />
many $10 bills were in circulation?<br />
Estimate. Explain which method you used to estimate.<br />
27. 30% of 89 28. 25% of 162 29. 38% of 88<br />
30. 81% of 25 31. 1 4 % of 806 32. 1 % of 40<br />
5<br />
33. 127% of 64 34. 140% of 95 35. 295% of 145<br />
SPACE For Exercises 36–38, refer to the information in the table.<br />
36. Which planet has a<br />
Radius and Mass of Each Planet<br />
radius that measures<br />
Planet Radius (mi) Mass<br />
about 50% of the radius<br />
of Mercury?<br />
Mercury<br />
1516 0.0553<br />
37. Name two planets such<br />
Venus<br />
3761 0.815<br />
Earth<br />
3960 1.000<br />
that the radius of one planet<br />
is about one-third the radius<br />
of the other planet.<br />
Mars<br />
Jupiter<br />
Saturn<br />
2107<br />
43,450<br />
36,191<br />
0.107<br />
317.830<br />
95.160<br />
Uranus<br />
15,763 14.540<br />
38. Name two planets such<br />
Neptune<br />
15,304 17.150<br />
that the mass of one planet<br />
Pluto<br />
707 0.0021<br />
is about 330% the mass of<br />
Source: The World Almanac<br />
the other.<br />
39. GEOGRAPHY The United States has 88,633 miles of shoreline. Of the<br />
total amount, 35% is located in Alaska. About how many miles of<br />
shoreline are located in Alaska?<br />
Geography<br />
There are four U.S.<br />
coastlines. They are the<br />
Atlantic, Gulf, Pacific, and<br />
Arctic coasts. Most of the<br />
coastline is located on the<br />
Pacific Ocean. It contains<br />
40,298 miles.<br />
Source: The World Almanac<br />
40. GEOGRAPHY About 8.5% of the total Pacific coastline is located in<br />
California. Use the information at the left to estimate the number of miles<br />
of coastline located in California.<br />
41. FOOD A serving of shrimp contains 90 Calories and 7 of those Calories<br />
are from fat. About what percent of the Calories are from fat?<br />
42. FOOD Fifty-six percent of the Calories in corn chips are from fat.<br />
Estimate the number of Calories from fat in a serving of corn chips if one<br />
serving contains 160 Calories.<br />
296 <strong>Chapter</strong> 6 Ratio, Proportion, and Percent
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