84 Chapter 1 The Set of Real Numbers Concept 3: Applications Involving Subtraction 71. On the game, Jeopardy, Jasper selected the category “The Last.” He got the first four questions correct (worth $200, $400, $600, and $800) but then missed the last question (worth $1000). Write an expression that determines Jasper’s score. Then simplify the expression to find his total winnings for that category. (See Example 4.) 200 400 600 800 1000; $1000 72. On Courtney’s turn in Jeopardy, she chose the category “Birds of a Feather.” She already had $1200 when she selected a Double Jeopardy question. She wagered $500 but guessed incorrectly (therefore she lost $500). On her next turn, she got the $800 question correct. Write an expression that determines Courtney’s score. Then simplify the expression to find her total winnings for that category. 1200 500 800; $1500 73. In Ohio, the highest temperature ever recorded 113° 39° was F and the lowest was F. Find the difference between the highest and lowest temperatures. (Source: Information Please Almanac) (See Example 5.) 152°F 74. In Mississippi, the highest temperature ever recorded was 115° F and the lowest was 19° F. Find the difference between the highest and lowest temperatures. (Source: Information Please Almanac) 134°F 75. The highest mountain in the world is Mt. Everest, located in the Himalayas. Its height is 8848 meters (m) (29,028 ft). The lowest recorded depth in the ocean is located in the Marianas Trench in the Pacific Ocean. Its “height” relative to sea level is 11,033 m (36,198 ft). Determine the difference in elevation, in meters, between the highest mountain in the world and the deepest ocean trench. (Source: Information Please Almanac) 19,881 m 76. The lowest point in North America is located in Death Valley, California, at an elevation of 282 ft (86 m). The highest point in North America is Mt. McKinley, Alaska, at an elevation of 20,320 ft (6194 m). Find the difference in elevation, in feet, between the highest and lowest points in North America. (Source: Information Please Almanac) 20,602 ft Concept 4: Applying the Order of Operations For Exercises 77–96, perform the indicated operations. (See Examples 6 and 7.) 77. 6 8 (2) 4 1 13 78. 3 (4) 1 2 5 5 79. 1 7 (3) 8 10 9 80. 13 7 4 3 (1) 8 81. 2 (8) 7 3 15 5 82. 8 (13) 1 9 13 83. 6 (1) (8) (10) 84. 8 (3) (5) (2) 85. 2 2 515 525 233 11246 b 86. 18 87. 88. 1 8 b 2 3 a 89. 90. 91. 2 8 198 132 5 010 1320 012 1620 06 8 0 012 5 0 9 92. 2 93. 94. 12 14 6 6 122 2 3 4 5 4 122 95. 96. 1 129 142 7 9 8 1 4b a 5 6 a2 5 4 b a 122b 29 3 93 9 4 7 11 14 a 9 7b 3 2 11 30 13 10 8 15 a 4 511 34 19246 25 18 11 Writing Translating Expression Geometry Scientific Calculator Video
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