An infant drinks about 28 ounces of milk per day. There are 32 ounces in a quart, so the baby drinks 28 ÷ 32 = 0.875 quarts of milk per day.
Four weeks is 4 × 7 = 28 days.
In 4 weeks, the baby drinks 28 × 0.875 = 24.5 quarts of milk.
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