Question

Rachel wants to find the best price for potatoes at the grocery store. She sees a 10-pound bag for $5.90, a 5-pound bag for $2.75 and a 11/2 pound bag for $0.99. Which bag has the lowest price per pound?

Answer 1

5 pound bag.

Explanation:

We have been given that Rachel sees a 10-pound bag for $5.90, a 5-pound bag for $2.75 and a 1 1/2 pound bag for $0.99. We are asked to find the lowest price per pound.

Let us find unit price per each bag.

`\text{Unit price for 10 pound bag}=\frac{\$5.90}{\text{10 pounds}}`

`\text{Unit price for 10 pound bag}=\frac{\$0.59}{\text{pound}}`

`\text{Unit price for 5 pound bag}=\frac{\$2.75}{\text{5 pounds}}`

`\text{Unit price for 5 pound bag}=\frac{\$0.55}{\text{ pound}}`

`\text{Unit price for 1 1/2 pound bag}=\frac{\$0.99}{1(1)/(2)\text{ pounds}}`

`\text{Unit price for 1 1/2 pound bag}=\frac{\$0.99}{1.5\text{ pounds}}`

`\text{Unit price for 1 1/2 pound bag}=\frac{\$0.66}{\text{ pound}}`

Upon comparing all bags, we can see that 5 pound bag costs $0.55 per pound of potato. Therefore, 5-pound bag has the lowest price per pound.

Answer 2

Answer: the 5-pound bag for $2.75 has the lowest price per pound.

Explanation:

At the grocery store, she sees a 10-pound bag of potato for $5.90. It means that the cost per pound of potato is

5.9/10 = $0.59

She a 5-pound bag for $2.75. It means that the cost per pound of potato is

2.75/5 = $0.55

She sees a 11/2 pound bag for $0.99. It means that the cost per pound of potato is

5.5/0.99 = $5.56

Therefore, the 5-pound bag for $2.75 has the lowest price per pound.