Final answer:
The temperature at noon was 23.5°F, found by adding the temperature decrease of 23.6°F to the midnight temperature of -0.1°F. Option C is correct.
Step-by-step explanation:
If the temperature at midnight was -0.1°F and it went down by 23.6°F since noon, we must find the temperature at noon by adding the decrease to the midnight temperature. This is because when we are told the temperature went down, it means that the temperature at noon was higher, and we reverse the decrease by adding.
So, the calculation will be as follows:
Midday temperature = Midnight temperature + Temperature decrease
Midday temperature = -0.1°F + 23.6°F
Midday temperature = 23.5°F.
Therefore, the temperature at noon was 23.5°F.
To find the temperature at noon, we need to determine the initial temperature before the decrease. Since the temperature went down by 23.6°F between noon and midnight, we can add 23.6°F to the temperature at midnight, which is -0.1°F. This gives us -0.1°F + 23.6°F = 23.5°F. Therefore, the temperature at noon was 23.5°F (Option A).