Which one of the following statements expresses a true proportion? a. 54: 9 = 6: 3 b. 2: 1 = 1: 2 c. 3: 4 = 9: 12 d. 7: 9 = 8: 9

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?