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A model airplane flies 18 feet in 2 seconds. what is the airplane's speed in miles per hour? round your answer to nearest hundredth.

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  1. 1 hour = 60 * 60 = 3,600 seconds

    Solve this proportion.

    18/2 = x/3,600

    https://www.mathsisfun.com/algebra/proportions.html

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    Ms. Sue
  2. 0.0025

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  3. 18 ft/ 2 sec

    = (18/5280) miles / (2/3600) hrs
    = (18/5280)(3600/2) mph
    = appr 6.14 mph

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  4. 126

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