Page 69 - Basic College Mathematics with Early Integers

46 C HAPTE R 1 I THE WHOLE NUMBERS

61. Head Start is a national program that provides 62. Enrollment figures at a local community college
developmental and social services for America’s showed an increase from 49,713 credit hours in 2005
low-income preschool children ages three to five. to 51,746 credit hours in 2006. Round each number to
Enrollment figures in Head Start programs showed the nearest thousand to estimate the increase.
an increase from 905,851 in 2004 to 908,412 in 2007.
Round each number of children to the nearest
thousand to estimate this increase. (Source: U.S.
Department of Health and Human Services)

Mixed Practice (Sections 1.2 and 1.5) The following table shows the top five leading U.S. television advertisers
in 2007 and the amount of money spent that year on advertising. Complete this table.The first line is completed for you.
(Source: Television Bureau of Advertising)

Amount Spent Standard Standard Form
on Television Amount Written Form Rounded Rounded to
Advertising in 2007 in Standard to Nearest Nearest
Advertiser (in millions of dollars) Form Ten-Million Hundred-Million
General Motors, Dealers 443 $443,000,000 $440,000,000 $400,000,000
63. Chrysler-Cerberus 391
64. Ford, Dealers 364
65. AT & T Inc. 349
66. Toyota, Dealers 311

Concept Extensions

67. Find one number that when rounded to the nearest 68. Find one number that when rounded to the
hundred is 5700. nearest ten is 5700.

69. A number rounded to the nearest hundred is 8600. 70. On August 23, 1989, it was estimated that 1,500,000
people joined hands in a human chain stretching
a. Determine the smallest possible number.
370 miles to protest the fiftieth anniversary of the
b. Determine the largest possible number. pact that allowed what was then the Soviet Union
to annex the Baltic nations in 1939. If the estimate
of the number of people is to the nearest hundred-
thousand, determine the largest possible number
of people in the chain.

71. In your own words, explain how to round a number 72. In your own words, explain how to round 9660 to
to the nearest thousand. the nearest thousand.

73. Estimate the perimeter of the rectangle by first 74. Estimate the perimeter of the triangle by first
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rounding the length of each side to the nearest ten. rounding the length of each side to the nearest
hundred.
54 meters
Rectangle 17 meters 5950 miles 7693 miles

8203 miles