Wind chillIf x is the wind speed in miles per hour and is greater than or equal to 5, then the wind…

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Wind chill

If x is the wind speed in miles per hour and is greater than or equal to 5, then the wind chill (in degrees Fahrenheit) for an air temperature of 0°F can be approximated by the function

ƒ(x) have a physical interpretation? If so, what is it, and is it meaningful?