<PRE><B>Question 1067761</B>
rate * time = distance
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we are given time = 75 seconds and distance = 1 mile
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we want the rate to be expressed as miles per hour so we convert 75 seconds to a fraction of an hour
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there are 60 * 60 = 3600 seconds in an hour, therefore
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75 / 3600 = 0.020833333 or approximately 0.0208 hours
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rate = 1 / 0.0208 = 48.0769 or approximately 48 miles per hour
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