2 Rosa believes she can use a division expression to find the cost per pound of ground beef when 3 pound sells for $4. Which statement best explains why Rosa is correct or incorrect? ROsa is correct in using a division expression because the term "per" implies the quotient of the quantities before and after that word. Rosa is correct in using a division expression because the cost per pound should be less than $4. Rosa is incorrect in using a division expression because "cost per pound" refers to the product of the price and weight. Rosa is incorrect in using a division expression because the cost per pound must be an integer.