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Answer :

[tex]\text{The temperature at 1 pm is -30}\degree F[/tex]

Here, we are told that the temperature drops at a certain rate

What this mean in this context is that it becomes colder as the hours roll by

The difference between 12 noon and 1 pm is just 1 hour

So the temperature after the drop in just one hour will be;

[tex]-27.5\degree F\text{ - }2.5\degree F\text{ = -30}\degree F[/tex]