To determine how much the amount of water in the canteen should change every 10 minutes, we start with the recommendation of drinking 24 ounces of water per hour.
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Convert the hourly rate into a 10-minute rate:
- There are 60 minutes in an hour, so to find out how much water is consumed in 10 minutes, we can use the following calculation: \[ \text{Water per 10 minutes} = \frac{24 \text{ ounces}}{60 \text{ minutes}} \times 10 \text{ minutes} \]
- This simplifies to: \[ \text{Water per 10 minutes} = \frac{24}{6} = 4 \text{ ounces} \]
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Interpret the change in the canteen: Since the hikers are consuming water, the amount of water in the canteen will decrease by 4 ounces every 10 minutes.
Thus, the amount of water in the canteen should change by −4 ounces every 10 minutes.
The correct response is: −4 ounces (negative 4 ounces).