CHAPTER 1 Review Exercises 37 25. Railroad Car Estimation The scale of a model railroad is 1 in. 12.5 ft. = Estimate the length and height of an actual box car if this drawing is the same size as the model box car. 1.3 Solve the following problems. 26. Buying a Copy Machine David can buy a copier from Staples for $500 that prints, copies, and scans. He can either pay the total amount at the time of purchase, or he can agree to pay the store $50 down and $40 a month for 12 months. How much money can he save by paying the total amount at the time of purchase? $30 27. Buying in Quantity A six-pack of bottled water costs $1.99. A case of 4 six-packs costs $4.99. How much will be saved by purchasing the case rather than 4 individual six-packs? $2.97 28. Jet Ski Rental The rental cost of a jet ski from Freemac Marina is $15 for 15 minutes and the cost from Silvan Rental is $25 per half-hour. If you plan to rent the jet ski for 2 hours, which is the better deal and by how much? Silvan is less expensive by $20. 29. Fishing Charter Sam and four of his friends want to schedule a 6-hour fishing trip on Lake Ontario with Reel Easy Sport Fishing. The cost for five people is $445. The cost for six people is $510. How much money per person will Sam and each of his friends save if they can find one more friend to go on their fishing trip? Assume that they will split the total cost equally. $4 30. Applying Fertilizer Ronaldo needs to apply fertilizer to his lawn on his farm. A 30-pound bag of fertilizer will cover an area of 2500 square feet. a) How many pounds of fertilizer are needed to cover an area of 24,000 square feet? 288 lb b) If Ronaldo has only 150 pounds of fertilizer, how many square feet can he fertilize? 12,500 ft2 31. Auto Insurance Most insurance companies reduce premiums by 10% for people under the age of 25 who successfully pass a driver’s education course. A particular driver’s education course costs $60. Patrick, who just turned 18, has auto insurance that costs $1030 per year. By taking the driver’s education course, how much would he save in auto insurance, including the cost of the course, from the age of 18 until the age of 25? $661 Length 22 ft; height 8 ft 32. Pediatric Dosage If 1.5 milligrams of a medicine is to be given for 10 lb of body weight, how many milligrams should be given to a child who weighs 52 lb? 7.8 mg 33. Qualifying for a Mortgage Serena’s bank will grant her a mortgage provided the monthly mortgage payments are not greater than 28% of her monthly take-home pay. What is the maximum monthly mortgage payment the bank will grant to Serena if her gross monthly salary is $5500 and her payroll deductions are 30% of her gross monthly salary? $1078 34. Flying West New York City is on eastern standard time, St. Louis is on central standard time (1 hour earlier than eastern standard time), and Las Vegas is on Pacific standard time (3 hours earlier than eastern standard time). A flight leaves New York City at 9 a.m. eastern standard time, stops for 50 min in St. Louis, and arrives in Las Vegas at 1:35 p.m. Pacific time. How long is the plane actually flying? 6 hr 45 min 35. Crossing Time Zones The international date line is an imaginary line of longitude (from the North Pole to the South Pole) on Earth’s surface between Japan and Hawaii in the Pacific Ocean. Crossing the line east to west adds a day to the present date. Crossing the line west to east subtracts a day. At 3:00 p.m. on July 25 in Hawaii, what is the time and date in Tokyo, Japan, which is four time zones to the west? July 26, 11:00 a.m. 36. Conversions If 1 mi 1.6 km, = a) convert 65 miles per hour to kilometers per hour. 104 km/hr b) convert 90 kilometers per hour to miles per hour. 56.25 mi/hr 37. Dot Pattern If the following pattern is continued, how many dots will be in the hundredth figure? 201 38. Magic Square The following magic square uses each number from 6 to 21 exactly once. Complete the magic square by using the unused numbers from 6 through 21 exactly once. * 21 10 14 15 11 9 7 12 18 17 19 39. Magic Square Create a magic square by using the numbers 13, 15, 17, 19, 21, 23, 25, 27, and 29. The sum of the numbers in every row, column, and diagonal must be 63. * *See Instructor Answer Appendix
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