If 2.2 pounds of a certain grain cost $1.54, how much will 5.7 pounds of the grain cost?

First find the cost per pound: $1.54 ÷ 2.2 = $0.70 per pound. Then multiply by 5.7 pounds: 5.7 × $0.70 = $3.99. The grain will cost $3.99, choice D.

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