In January 2014 the so-called "Polar Vortex" of dense, frigid air plunged deep into the United States and resulted in record cold temperatures and dangerous wind chills. If s is the wind speed in miles per hour and s ‰¥ 5, then the wind chill (in degrees Fahrenheit) for an air temperature of 0°F can be approximated by the Function

(a) At what rate is the wind chill changing when the wind speed is 20 mph?
(b) Explain the meaning of your answer to part (a).

Transcribed Image Text:

289.173 – 58.5731s f(s) = s+1