A weather station on the top of a mountain reports that the temperature is currently \(0^\circ\text{C}\) and has been falling at a constant rate of \(3^\circ\text{C}\) per hour. If it continues to fall at this rate, find each indicated temperature. Explain or show your reasoning.
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What will the temperature be in 2 hours?
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What will the temperature be in 5 hours?
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What will the temperature be in \(\frac12\) hour?
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What was the temperature 1 hour ago?
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What was the temperature 3 hours ago?
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What was the temperature 4.5 hours ago?