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Part 1:

The temperature of a pie is [math] degrees Fahrenheit [math] hours after being removed from the oven. After [math] hours out of the oven the temperature of the pie is [math] degrees Fahrenheit.
Derive an exponential formula [math] for the temperature of a pie as a function of time, [math] in hours.
The formula is going to look something like [math]
The pie went from a temperature of [math] degrees to a lower temperature of [math] degrees in a time span of hours.

Solution:

Part 2:

Part 3: