Final answer:
The temperature at midnight, after dropping 15°C from 8°C at noon, was -7°C.
Step-by-step explanation:
The temperature at noon on a winter day was 8°C. If the temperature drops by 15°C by midnight, we have to subtract this decrease from the noon temperature. If the temperature at noon was 8°C and it dropped by 15°C, you can find the temperature at midnight by subtracting 15°C from the noon temperature. The calculation is as follows:
Midnight Temperature=Noon Temperature−Temperature Drop
Midnight Temperature 8°C - 15°C = -7°C
Therefore, the temperature at midnight was -7°C. The negative sign indicates a temperature below freezing