The urban heat island Urban areas have higher average air temperatures than rural area...

The urban heat island

Urban areas have higher average air temperatures than rural areas, as a result of the presence of buildings, asphalt, and concrete. This phenomenon has become known as the urban heat island. The temperature difference T (in °C) between urban and rural areas near Montreal, with a population P between 1000 and 1,000,000, can be described by the formula

where v is the average wind speed (in mi/hr) and v ≥ 1. If T =3 and v = 5, find P.