Problem:
Wind chill is a measure of how cold people feel when exposed to wind outside. A good estimate for wind chill can be found using this calculation:
Where represents the wind chill, represents air temperature measured in degrees Fahrenheit (), and represents wind speed measured in miles per hour (mph). Suppose the air temperature is and the wind speed is mph. Which of the following is closest to the approximate wind chill?
Answer Choices:
A.
B.
C.
D.
E.
Solution:
Applying the given formula
and substituting the temparature of and wind speed of 18 mph leads to the approximation
which is closest to choice (B) .
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions