Wind chill is a measure of how cold people feel when exposed to wind outside

MATHEMATICS · Numerical · US High School · Algebra 1 · Algebra Foundations · Algebra Foundations

Problem

Wind chill is a measure of how cold people feel when exposed to wind outside. A good estimate for wind chill is given by

\text{wind chill}=\text{air temperature}-0.7\times\text{wind speed}

where temperature is measured in degrees Fahrenheit (

^\circ\text{F}

) and wind speed is measured in miles per hour. Suppose the air temperature is

36^\circ\text{F}

and the wind speed is

18\text{ mph}

. What is the approximate wind chill?