Abby can buy an 8 pound bag of dog food for 7.40 or a 4 pound bag of the same dog food for 5.38 which is better buy

The 8 pound bag is a better deal

8 Pound Bag

8= 7.40

1= 0.925

93 cents per pound

4 pound bag

4= 5.38

1= 1.345

1 dollar and 35 cents per pound

The 8 pound bag is a better deal by 42 centers per pound 

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.