Answer:
Step-by-step explanation: At 2pm, the temperature was 15 degrees. By midnight, the temperature dropped by 30 degrees.
To find the temperature at midnight, we can subtract 30 degrees from the initial temperature of 15 degrees.
15 degrees - 30 degrees = -15 degrees
Therefore, the temperature at midnight is -15 degrees.
It's important to note that a negative temperature indicates that it is below freezing point. In this case, the temperature dropped significantly, resulting in a very cold temperature at midnight.