Page 58 - Basic College Mathematics with Early Integers

S E C T ION 1. 4 I SUBTRACTING WHOLE NUMBERS 35

A river basin is the geographic area drained by a river and its tributaries.The Mississippi River Basin is the third largest
in the world and is divided into six sub-basins, whose areas are shown in the following bar graph. Use this graph for
Exercises 57 through 60.
Mississippi River Basin
57. Find the total U.S. land area drained by the 600
Upper Mississippi and Lower Mississippi 530,000
sub-basins. 500
Area (in square miles) 300 247,000
58. Find the total U.S. land area drained by the 400
Ohio and Tennessee sub-basins.

59. How much more land is drained by the 189,000
Missouri sub-basin than the Arkansas 200 164,000
Red-White sub-basin?
100 75,000
40,000
60. How much more land is drained
by the Upper Mississippi sub-basin 0
Missouri Arkansas Upper Lower Ohio Tennessee
than the Lower Mississippi sub-basin? Red-White Mississippi Mississippi
Sub-Basins
61. The peak of Mt. McKinley in Alaska is 20,320 feet 62. On January 12, 1916, the city of Indianapolis,
above sea level.The peak of Long’s Peak in Indiana, had the greatest temperature change
Colorado is 14,255 feet above sea level. How much in a day. It dropped 58 degrees. If the high
higher is the peak of Mt. McKinley than Long’s temperature was 68° Fahrenheit, what was
Peak? (Source: U.S. Geological Survey) the low temperature?

69
?
65

20,320 feet 14,255 feet 69
Indianapolis
Indianapolis
Indianapolis
74
70
70
74
Mt. McKinley, Alaska Long’s Peak, Colorado 65
164

63. The Oroville Dam, on the Feather River, is the 64. A new iPhone with 32 GB costs $299. Jocelyn
tallest dam in the United States at 754 feet.The Robinson has $713 in her savings account. How
Hoover Dam, on the Colorado River, is 726 feet much will she have left in her savings account after
high. How much taller is the Oroville Dam than the she buys the iPhone? (Source: Apple, Inc.)
Hoover Dam? (Source: U.S. Bureau of Reclamation)

65. The distance from Kansas City to Denver is 645 66. Pat Salanki’s blood cholesterol level is 243.The
miles. Hays, Kansas, lies on the road between the doctor tells him it should be decreased to 185. How
two and is 287 miles from Kansas City.What is the much of a decrease is this?
distance between Hays and Denver?

67. A new DVD player with remote control costs $295. 68. A stereo that regularly sells for $547 is discounted by
A college student has $914 in her savings account. $99 in a sale.What is the sale price?
How much will she have left in her savings account
after she buys the DVD player?