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what is the speed in miles per hour of toy car that runs 40 ft in 8 seconds. 1 hour=3600. 1 mile=5280 ft

  • algebra -

    Cross multiply and solve for x.

    40/8 = x/3600
    8x = 144,000
    x = 18,000 ft

    18,000 / 5,280 = 3.4 mph

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