The heat index is a measure of how hot it really feels under different combinations of temperature and humidity. The heat index, in degrees Fahrenheit, can be approximated by H(T)=T-0.9971eā°.02086T[1-eā°.0445(D-57.2)], where the temperature T and dew point D are both expressed in degrees Fahrenheit. What is the formula to calculate the heat index?
