78 Chapter 1 Whole Numbers Concept 3: Applications Involving Multiple Operations 35. Jackson purchased a used car for $16,540. He paid $2500 down and paid the rest in equal monthly payments over a 36-month period. How much were his monthly payments? (See Example 5.) 36. Lucio purchased a refrigerator for $1170. He paid $150 at the time of purchase and then paid off the rest in equal monthly payments over 1 year. How much was his monthly payment? 37. Monika must drive from Watertown to Utica. She can travel directly from Watertown to Utica on a small county road, but will only average 40 mph. On the route through Syracuse, she travels on highways and can average 60 mph. Which route will take less time? (See Example 6.) 38. Rex has a choice of two routes to drive from Oklahoma City to Fort Smith. On the interstate, the distance is 220 mi and he can drive 55 mph. If he takes the back roads, he can only travel 40 mph, but the distance is 200 mi. Which route will take less time? 39. If you wanted to line the outside of a garden with a decorative border, would you need to know the area of the garden or the perimeter of the garden? Watertown Syracuse Utica Figure for Exercise 37 40. If you wanted to know how much sod to lay down within a rectangular backyard, would you need to know the area of the yard or the perimeter of the yard? 41. Arisu wants to buy molding for a room that is 12 ft by 11 ft. No molding is needed for the doorway, which measures 3 ft. See the figure. If molding costs $2 per foot, how much money will it cost? (See Example 7.) 42. A homeowner wants to fence her rectangular backyard. The yard is 75 ft by 90 ft. If fencing costs $5 per foot, how much will it cost to fence the yard? 70 mi 80 mi 50 mi 11 ft 12 ft 11 ft 12 ft 3 ft 45. The balance in Gina’s checking account is $278. If she writes checks for $82, $59, and $101, how much will be left over? 46. The balance in Jose’s checking account is $3455. If he write checks for $587, $36, and $156, how much will be left over? 6 yd 5 yd 12 ft 20 ft 43. What is the cost to carpet the room whose dimensions are shown in the figure? Assume that carpeting costs $34 per square yard and that there is no waste. 44. What is the cost to tile the room whose dimensions are shown in the figure? Assume that tile costs $3 per square foot. 47. A community college bought 72 new computers and 6 new printers for a computer lab. If computers were purchased for $2118 each and the printers for $256 each, what was the total bill (not including tax)?
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