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72 Chapter 1 Whole Numbers 36. A textbook company ships books in boxes containing a maximum of 12 books. If a bookstore orders 1250 books, how many boxes can be filled completely? How many books will be left over? 37. A farmer sells eggs in containers holding a dozen eggs. If he has 4257 eggs, how many containers will be filled completely? How many eggs will be left over? 38. Marc pays for an $84 dinner with $20 bills. a. How many bills must he use? b. How much change will he receive? 39. Byron buys three CDs for a total of $54 and pays with $10 bills. a. How many bills must he use? b. How much change will he receive? 40. Ling has three jobs. He works for a lawn maintenance service 4 days a week. He also tutors math and works as a waiter on weekends. His hourly wage and the number of hours for each job are given for a 1-week period. How much money did Ling earn for the week? 41. An electrician, a plumber, a mason, and a carpenter work at a construction site. The hourly wage and the number of hours each person worked are summarized in the table.What was the total amount paid for all four workers? Hourly Wage Number of Hours Tutor $30/hr 4 Waiter 10/hr 16 Lawn 8/hr 30 maintenance Hourly Wage Number of Hours Electrician $36/hr 18 Plumber 28/hr 15 Mason 26/hr 24 Carpenter 22/hr 48 Concept 2: Computing a Mean (Average) For Exercises 42–44, find the mean (average) of each set of numbers. (See Example 4.) 42. 19, 21, 18, 21, 16 43. 105, 114, 123, 101, 100, 111 44. 1480, 1102, 1032, 1002 45. Neelah took six quizzes and received the following scores: 19, 20, 18, 19, 18, 14. Find her quiz average. 46. Shawn’s scores on his last four tests were 83, 95, 87, and 91.What is his average for these tests? 47. Automobile companies have been striving to improve the fuel efficiency of their cars. In a recent year, four of the most efficient cars built by one company had mileage ratings of 42 mpg, 41 mpg, 31 mpg, and 30 mpg. What was the average mileage rating for these vehicles? 48. One of the most popular automobile companies has been very competitive at building fuel-efficient autos. In a recent year, five of the most efficient cars had mileage ratings of 49 mpg, 30 mpg, 34 mpg, 31 mpg, and 26 mpg.What was the average mileage rating for these vehicles? 49. The monthly rainfall for Seattle,Washington, is given in the table. All values are in millimeters (mm). Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Rainfall 122 94 80 52 47 40 15 21 44 90 118 123 Find the average monthly rainfall for the months of November, December, and January.


miller_prealgebra_2e_ch1_3
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