Question

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 of the bags would be the best deal?

Answer 1

Given, Abby can buy an 8-pound bag of dog food for $7.40.

The cost of one pound bag when 8-pound bag of dog food for $7.40 is,

`\begin{gathered} C=(7.40)/(8) \\ =0.925 \end{gathered}`

Given, 4-pound bag of the same dog food costs $5.38.

Therefore, the cost of one pound bag when 4-pound bag of dog food costs $5.38 is,

`\begin{gathered} C=(5.38)/(4) \\ =1.345 \end{gathered}`

Since the cost of one pound bag has a smaller value(=0.925) when an 8-pound bag of dog food is bought, buying an 8-pound bag of dog food for $7.40 would be the best deal.