$\"\"$

The equation for cooling is $\"\"$ .

Where $\"\"$ , its core temperature.

Where $\"\"$ which is the temperature of the environment.

The value of $\"\"$ can be calculated by substituting $\"\"$ .

$\"\"$

One hour after it is removed the core tempreture is $\"\"$ .

Substiute $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$

The core tempreture five hours after the object is removed from the furnace :

$\"\"$

Substiute $\"\"$ .

$\"\"$

The core tempreture five hours after the object is removed from the furnace is $\"\"$ .