Question

Wich size bag of cat food show in the table has the lowest price

Answer 1

Size 40 oz bag of cat food has the lowest price.

Explanation:

Given are the three category of different size of bag having different cost.

Lets try to find out the cost of one unit of bag for each category.

(i) Size = 24

Cost= 5.49

To find one unit of bag price, divide cost by size of bag

One unit of bag cost =
`(5.49)/(24) = \$0.23`

∴ One unit of bag cost is
`\$ 0.23`

(ii) Size= 40

Cost= 8

One unit of bag cost =
`(8)/(40) = \$0.20`

∴ One unit of bag cost is
`\$ 0.20`

(iii) Size= 64

Cost= 15.99

One unit of bag cost=
`(15.99)/(64) = \$0.25`

∴ One unit of bag cost is
`\$ 0.25`

∵
`\$ 20` is the lowest price among all three bags of cat food.

∴ Size of 40 oz bag has the lowest price.

Answer 2

The 40 oz cat food costing $8.00 is the lowest cost.

Explanation:

Here, to compare the price of the cat food we need to find the UNIT RATE of the cat food of each size bag.

24 oz bag cost $5.49.

⇒ Cost of 1 oz cat food =
`(5.49)/(24 ) =0.22875`

or, the cost of 1 oz of cat food here is $0.22875.

40 oz bag cost $8.00.

⇒ Cost of 1 oz cat food =
`(8)/(40 ) =0.20`

or, the cost of 1 oz of cat food here is $0.20.

64 oz bag cost $15.99.

⇒ Cost of 1 oz cat food =
`(15.99)/(64 ) =0.2498`

or, the cost of 1 oz of cat food here is $0.2498.

Now, comparing the cost of 1 oz of cat food we seen that the lowest price of cat food per oz is $0.20 in the 40 oz pack.

Hence, the 40 oz cat food costing $8.00 costs the least.