Final answer:
The thermometer will continue to increase and approach the room temperature of 38°C after 4 minutes.
Step-by-step explanation:
To find the change in temperature of the thermometer in the room, we can use the concept of thermal equilibrium. In thermal equilibrium, two objects at different temperatures will eventually reach the same temperature. In this case, the thermometer reading 10°C will gradually increase until it reaches the room temperature of 38°C. After 3 minutes, the thermometer has reached a reading of 13°C, indicating that it is getting closer to the room temperature. Similarly, after 4 minutes, the thermometer will continue to increase and approach the room temperature. The exact reading will depend on the rate at which the thermometer adjusts to the room temperature. After 10 minutes, the thermometer will eventually reach the room temperature of 38°C.