Answer:
14 ounces for $2.10 is the better value
Explanation:
Laundry detergent as price 20 ounces for $3.40.
The unit price of the detergent =

= $0.17 per ounce.
Another laundry detergent as price 14 ounces for $2.10
The unit price of the detergent =

= $0.15 per ounce.
Second deal of 14 ounces for $2.10 ounces is the better value.