Answer:
Brand B is the better buy based on the unit price.
Explanation:
Given : Greg needs to buy plastic spoons.
To find : The unit price for each brand. Then state which brand is the better buy based on the unit price ?
Solution :
Unit price is the price for a single unit of measure of a product.
1) Brand A has a box of 25 spoons for $1.99.
So, 25 spoon cost $1.99.
1 spoon cost is

1 spoon cost is $0.0796.
Round to the nearest cent - $0.08.
2) Brand B has a box of 42 spoons for $3.89.
So, 42 spoon cost $3.89.
1 spoon cost is

1 spoon cost is $0.0926.
Round to the nearest cent - $0.09.
As 0.09 > 0.08
So, brand B is the better buy based on the unit price.