1. The problem asks for the unit rate of water usage in cubic feet per hour. 2. The unit rate is the amount of water used per one hour. 3. If the total water usage and the total time in hours are given, the unit rate is calculated by dividing the total water usage by the total time. 4. The formula is: $$\text{Unit Rate} = \frac{\text{Total Water Usage (cubic feet)}}{\text{Total Time (hours)}}$$ 5. For example, if the water usage is $W$ cubic feet over $T$ hours, then the unit rate is $$\frac{W}{T}$$ cubic feet per hour. 6. This means for every hour, $\frac{W}{T}$ cubic feet of water is used. 7. Without specific values, this is the general method to find the unit rate of water usage in cubic feet per hour.