You can put this solution on YOUR website! A forest snail travels at 5 inches in one minute.
Convert this to miles per hour.
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5 (inches/min)*(1 mile/(12*5280 inches)(60 min/1 hour)
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= (5*1*60)(12*5280)(miles/hour)
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= 0.0047 mph
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Cheers,
Stan H.