Winnie is buying dog food for her dog. She needs 10 pounds of food each week, but has room to store any extra food that she purchases.The food comes in 4 different sizes as given below:4.2 pounds for $4.998.5 pounds for $9.2712 pounds for $11.0420 pounds for $18.99Winnie is trying to be a smart shopper and get the best deal on the dog food. Which size bag of dog food should Winnie buy?
Answer
A
Winnie should buy the 4.2 pound bags.
B
Winnie should buy the 8.5 pound bags.
C
Winnie should buy the 12 pound bags.
D
Winnie should buy the 20 pound bags.
Explanation
Compare the cost per pound for each size: the 4.2-pound bag costs about $1.19 per pound, the 8.5-pound bag about $1.09, the 12-pound bag $0.92, and the 20-pound bag about $0.95. The 12-pound bag has the lowest cost per pound, and Winnie can store the extra food she doesn’t need that week. So Winnie should buy the 12-pound bags.
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