To find out how many pints per hour the hose fills the tub, we'll first convert the filling rate from ounces per minute to pints per hour.
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Determine ounces filled in one hour: \[ \text{Rate in ounces per hour} = 4 \text{ ounces/minute} \times 60 \text{ minutes/hour} = 240 \text{ ounces/hour} \]
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Convert ounces to pints: Given that \(16 \text{ ounces} = 1 \text{ pint}\), we can convert ounces to pints by dividing the total ounces by 16: \[ \text{Pints per hour} = \frac{240 \text{ ounces}}{16 \text{ ounces/pint}} = 15 \text{ pints} \]
Therefore, the hose fills the tub at a rate of 15 pints per hour.