Question 1187445
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In the real world, the problem is nonsense.<br>
We are told that the temperature at 5pm, 43.5 degrees Fahrenheit, is 1/3 of what the temperature was at 2pm.  It is nonsense to say one Fahrenheit temperature is 1/3 of another.<br>
It doesn't appear that the problem can be solved using any assumptions about what the actual information is; the rate of cooling between 2pm and 5pm is far greater than the rate between 8am and 2pm.<br>
The problem as posted makes no sense; it can't be solved.<br>