Question

Kara can buy an 8-

pound box of laundry
detergent for $7.40 or
a 4-pound box of the
same laundry
detergent for $5.38.
Which is the better
7.10
buy?

Answer 1

8- pound box

Explanation:

We can use unit rates to solve this problem.

8 lbs : $7.40 = 1 lbs : $0.925

4 lbs : $5.38 = 1 lbs : $1.345

Answer 2

Answer: 8-pound for $7.40
Explanation: If you buy two of the $5.38 it would be $10.76 so it would just be cheaper to buy the 8-pound.