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She paid $1.375 per pound of strawberries.What is the unit rate?When expressed rate as a fraction, a unit rate has a denominator of 1.Since 4 pounds cost $5.50, 1 pound of strawberries will cost 5.50/ 4 ≈ $1.375.To learn more about the unit rate from the given linkhttps://brainly.com/question/4895463#SPJ1