$\"\"$

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 temperature is $\"\"$ .

Substitute $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$

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

$\"\"$

Substitute $\"\"$ .

$\"\"$

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