At 1:00 pm the temp is 72 deg, the temp went down to 52 deg at 6:30, what is the temp at 4:00pm?

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  1. Temperature change is seldom linear, be we can assume so.
    Let time t be hours after 1PM
    at t=0
    m= (52-72)/5.5=-20/5.5
    T(4pm)=-20/5.5 *3+72=72-60/5.5=61deg

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