To find the temperature at midnight, we need to subtract the decrease in temperature from the noon temperature.
- Noon temperature = \( 11.4^\circ F \)
- Decrease in temperature = \( 15.7^\circ F \)
Now, we calculate the midnight temperature:
\[ \text{Midnight temperature} = \text{Noon temperature} - \text{Decrease} \]
\[ \text{Midnight temperature} = 11.4^\circ F - 15.7^\circ F \]
Now performing the subtraction:
\[ 11.4 - 15.7 = -4.3^\circ F \]
So, the temperature at midnight is \( -4.3^\circ F \).
The correct answer is:
A -4.3°F