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At the 2010 Winter Olympics, in Vancouver, BC, Usain Bolt won the 100 meters, finishing in 9.69 seconds (a world record.) What was his speed in miles per hour, rounded to the nearest tenth? (1 meter is approximately 39.37 inches.) State the answer in decimal form, rounded to tenths.

  • Math -

    speed= 100m/9.69sec*3600sec/hr*39.37in/m*1ft/12in*1mi/5280ft

    you can check your answer by putting this in your google search window:
    100 m/9.69 seconds in mi/hr

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