A hot air balloon descends at a rate of 320 feet per minute for 3 minutes. Use integers to calculate and represent the balloon's total change in altitude.

The volume of water in a reservoir decreases 21,000 cubic yards over a 3-month period. What is the average change in volume per month?

From midnight to 6:00 am, the temperature rose 8°C. At 6:00 am, the temperature was
-20 °C. What was the temperature at midnight?

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