Section 1.6 Division of Whole Numbers 57 Skill Practice 19. The cost for four different types of pastry at a French bakery is shown in the bar graph. Melissa has $360 to spend on desserts. a. If she spends all the money on chocolate éclairs, how many can she buy? b. If she spends all the money on apple tarts, how many can she buy? Answers 19. a. 180 chocolate éclairs b. 72 apple tarts and subtract. 20 5 100 Bring down the 0. 20 5 100 and subtract. Cost for Selected Pastries Cost ($) 5 4 3 2 1 0 2 4 3 5 Chocolate éclairs Almond tarts Chocolate truffles Apple tarts Solution: 1089 mi rounds to 1100 mi. The speed is represented by 1100 mi per 20 hr, or 55 201100 100 100 100 0 Max and Elaine averaged approximately 55 miles per hour (mph). Solving an Application Involving Division The bar graph in Figure 1-10 depicts the number of calories burned per hour for selected activities. 800 a. Janie wants to burn 3500 calories per week exercising. For how many hours must she jog? b. For how many hours must Janie bicycle to burn 3500 calories? Solution: a. The total number of calories must be divided into 500-calorie increments. Thus, the number of hours required is given by Janie requires 7 hr of jogging to burn 3500 calories. b. 3500 calories must be divided into 700-calorie increments.The number of hours required is given by Janie requires 5 hr of bicycling to burn 3500 calories. 5 7003500 3500 0 3500 700. 7 5003500 3500 0 3500 500. Number of Calories per Hour for Selected Activities Number of Calories per Hour 700 600 500 400 300 200 100 0 500 500 350 140 700 Jogging Tennis Walking Sleeping Bicycling Example 10 Figure 1-10
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