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quiz2 solutions QRMS

# quiz2 solutions QRMS - Math 1012 QRMS Name Quiz 2 Feb 17...

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Math 1012: QRMS Quiz 2 Feb. 17, 2012 Name: 2B 65 Suppose that a fuel-efficient German car travels an average of 26 kilometers on 1 liter of gasoline. If gasoline costs 1.50 euros per liter, how much will it cost to drive 300 kilometers? Solution: We have the quantities: 26 km/L , 1 . 5 /L, 300 km To get the desired units of euros ( ) we can combine the units as follows: km ÷ km L × L = km × L km × L = . Doing the same computation with the numbers gives: Total cost = (300 km) ÷ 26 km L × 1 . 5 L = 17 . 31 Optionally we could convert this to dollars by applying the appropriate conversion factor (found in the text): 17 . 31 × \$1 . 256 €1 = \$21 . 74 3B 60 In 2007, Walmart had profits of \$12.7 billion. Exress this profit in terms of dollars per minute. Solution: We currently have a number with units of \$/year. To get to units of \$/min we just need to apply conversion factors:

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