To find the rate at which Oliver practiced the piano in minutes per day, we need to first determine the total number of days in 4 weeks and then divide the total minutes practiced by that number of days.
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Calculate the number of days in 4 weeks: \[ 4 \text{ weeks} \times 7 \text{ days/week} = 28 \text{ days} \]
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Now, divide the total minutes practiced (448 minutes) by the total number of days (28 days): \[ \frac{448 \text{ minutes}}{28 \text{ days}} = 16 \text{ minutes/day} \]
Thus, Oliver practiced the piano at a rate of 16 minutes per day.
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