206 Chapter 3 Fractions and Mixed Numbers: Addition and Subtraction 2 3 29. 30. 31. 7 8 2 3 2 a2 32. 33. 34. Concept 2: Applications of Fractions and Mixed Numbers 35. Acceleration on cars is often compared by the time it takes to go from 0 to 60 miles per hour (mph). The graph gives the times for four cars. (See Example 4.) a. What is the difference between the times for the Lamborghini and the Caterham? b. Find the average time for these four cars. 36. Luis keeps a portfolio and tracks the number of hours he spends working on math each day. a. How much time did Luis spend last week working on math? b. Find the average amount of time spent per day working on math. 2 a2 a4 2 1 9 b a2 1 11 36 a5 1 b a3 b 13 16 a b b 1 2 b 2 9 a1 2 b 1 4 b 1 3 a2 1 2 1 7 8 b a1 1 7 b a6 3 4 2 1 8 b a1 1 2 b 37. Six women went on a weight loss program for 4 weeks. The amount of weight lost for each woman is given in the graph. a. Find the total weight loss. b. Find the average weight loss per person. c. Find the difference between the maximum weight loss and the minimum weight loss. 3.9 3.8 3.7 3.6 3.5 3.4 3.3 5 4 3 2 1 1 2 4 3 Wednesday Friday Saturday 12 1 10 8 6 4 2 38. Geoff ran 4 mi on Monday, 2 mi on Tuesday, 3 mi on Wednesday, and 8 mi on Thursday. a. What is the total distance he ran? b. What is the average distance he ran per day? 34 1 2 1 4 Cars with the Fastest 0–60 Times Seconds 3.2 2 3 5 1 3 2 4 3 5 7 310 Caterham Westfield Lamborghini TVR Tuscan Time Spent Studying Math Hours 0 1 2 2 1 4 3 3 4 2 1 4 1 2 Monday Tuesday Thursday Sunday Weight Loss Amount Lost (lb) 0 4 11 10 8 1 7 2 1 9 2 3 4 4 Gail Jennifer Christel Tonya Maria Peg 39. A financial analyst followed a certain stock. On $1558 Monday, the stock was at . By Friday, it had fallen to . By how much did the stock drop? $1134 $1234 40. On Monday a stock closed at . On Tuesday, $112 the stock rose .What was the closing price of the stock on Tuesday? 1342. Aaron pays about of his annual salary (after 41. George will get of an $80,250 inheritance. How much money will he receive? (See Example 5.) 7 25 deductions) in federal income tax. If he makes $60,000 per year and claims deductions of $7250, how much tax must he pay? 1514 43. A -ft cable is cut into 4 pieces of equal length. How long is each piece? 44. Twenty-seven pounds of candy is distributed in -lb bags. How many bags can be filled? 34
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