Answer:
To determine the room temperature after 10 hours, we can perform the following calculation:
* Initial temperature = 80°C
* Temperature decrease per hour = 10°C
* Time duration = 10 hours
Room temperature after 10 hours:
Final temperature = Initial temperature - (Temperature decrease per hour * Time duration)
Final temperature = 80°C - (10°C/hour * 10 hours)
Final temperature = 80°C - 100°C
Final temperature = -20°C
Therefore, the room temperature after 10 hours will be -20°C.