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12 September, 15:24

When Amy roller-skates, she moves 90 yards per minute. What is her speed in miles per hour? Round your answer to the nearest hundredth.

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  1. 12 September, 16:01
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    Amy roller-skates 3.07 mile/hr

    Step-by-step explanation:

    90 yd/min = x mi/hr

    90 yd/min * 60 min/hr = 5400 yd/hr

    1 yard = 1760 mile

    1 second = 1/3600 hours

    5280 ft/mile / 3 ft/yd = 1760 yd/mi

    5400 yd/hr / 1760 yd/mile = 3.06818 mile/hr

    Round to the hundredth place.
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