问题描述：
math question.200points
Let T denote the temperature at time t.If the temperature is decreasing,is the rate of coling .The great temperature variation during a twelve-hour period occurred in Montana in 1916.When the temperature dropped from 44 to chilling-56.show that the rate of cooling exceeded -8f/h at some time during the period of change.
Let T denote the temperature at time t.If the temperature is decreasing,is the rate of coling .The great temperature variation during a twelve-hour period occurred in Montana in 1916.When the temperature dropped from 44 to chilling-56.show that the rate of cooling exceeded -8f/h at some time during the period of change.
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