7.5 Exercises Do the exercises, and check your work. Objective 1: Convert Between U.S. Customary and Metric Units Convert to the indicated unit. Round the answer to the nearest tenth, if necessary. Use the table on p. 604. 1) 50 ft to meters 2) 100 yd to meters 3) 200 yd to meters 4) 100 ft to meters 5) 2 c to milliliters 6) 3 gal to liters 7) 4 kg to pounds 8) 150 g to ounces 9) 70 cm to inches 10) 120 km to miles 11) 6 1 2 qt to liters 12) 2.4 gal to liters 13) 40 mi to kilometers 14) 7 in. to centimeters 15) 18 cm to inches 16) 130 km to miles 17) 63 kg to pounds 18) 470 g to ounces 19) 12.6 oz to grams 20) 23 3 4 lb to kilograms 21) 11 L to gallons 22) 7 L to quarts 23) 39 m to yards 24) 15 m to feet For Exercises 25–28, convert to the indicated metric unit: a) using the values in the table on p. 604 to get an approximation of the equivalent metric unit. b) using the exact relationships of 1 ft 12 in., 1 yd 36 in., 1 in. 2.54 cm, and 100 cm 1 m. 25) 10 ft to meters 26) 18 ft to meters 27) 50 yd to meters 28) 1 yd to meters Solve each problem. 29) The average length of goldfi sh ranges from 2 to 18 inches, depending on the variety. Find the length, in centimeters, of an 18-in. goldfi sh. (www.petco.com) 30) Marcia measures the length of her walking stride and fi nds it to be 26 in. How many centimeters is this? 31) A 9-kg bag of cat litter weighs approximately how many pounds? 32) A bag of dry dog food is available in a 15.5-lb bag. Approximately how many kilograms is this? 33) A dishwasher earns an Energy Star rating if it uses less than 5.8 gal of water per cycle. Does a dishwasher that uses 21 L of water per cycle qualify? (www.energystar.gov) 34) Mehdi’s luggage weighs 23 kg. If the airline charges an additional $25 to check a piece of luggage that weighs over 50 lb, will he have to pay the extra money for his bag? 35) To conserve water, Mark installs a new, ultralowfl ow toilet in his home that uses 6 L of water per fl ush. The old toilet uses 3.5 gal of water per fl ush. How much water, in gallons, does the new toilet save per fl ush? Round the answer to the nearest tenth. 36) Janet’s top-loading washing machine uses 28 gal of water to wash a medium-sized load while Trisha’s front-loading machine uses 50 L. Which machine uses less water, and by how much, in gallons? Round the answer to the nearest tenth. 37) Jeremy searches a fi eld with a metal detector and fi nds a pure gold nugget weighing 18.7 g. If the price of gold is $925.00 per ounce, how much is the nugget worth? 38) Ysela’s wedding band contains 8.4 g of platinum. If the price of platinum is $1713.00 per ounce, how much is the platinum content worth? Objective 2: Understand the Relationship Between the Fahrenheit and Celsius Scales Determine which Celsius temperature is appropriate for the situation. 39) On a snowy day, the temperature outdoors is ______. Choose from −4C, 8C, and 30C. 40) Hot cocoa is best served at ______. Choose from 10C, 46C, and 100C. 41) To bake a casserole, the oven temperature might be ______. Choose from 30C, 200C, and 375C. 42) A hot tub might have a water temperature of ______. Choose from 10C, 35C, and 80C. www.mhhe.com/messersmith SECTION 7.5 Metric–U.S. Customary Conversions and Temperature 609
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