Question

What is the unit rate for each size to the nearest cent? If the cost is less than a dollar, put a zero to the left of the decimal point.

Answer 1

Size C can is the best buy.

Explanation:

The given question is incomplete; here is the complete question.

One brand of canned salmon is sold in four different sizes.

Size A The 7 1/5 -ounce can costs $3.49.

Size B The 16 1/2 -ounce can costs $6.49.

Size C The 24 3/4 -ounce can costs $8.49.

Size D The 30 2/3 -ounce can costs $10.99. What is the unit rate for each size to the nearest cent? If the cost is less than a dollar, put a zero to the left of the decimal point.

Size Unit rate

A (Blank)

B (Blank)

C (Blank)

D (Blank)

What size is best to buy? explain how you know.

For Size A -
`7(1)/(5)` ounce or
`(36)/(5)` ounce can costs $3.49

Therefore, per ounce cost =
`\frac{\text{Total cost}}{\text{Size of can}}`

=
`(3.49)/((36)/(5))`

=
`(3.49* 5)/(36)`

= $0.48

For Size B -
`16(1)/(2)` or
`(33)/(2)` ounce can costs $6.49

Per ounce cost =
`(6.49)/((33)/(2))`

=
`(6.49* 2)/(33)`

= 0.39

For size C -
`24(3)/(4)` ounce or
`(99)/(4)` ounce can costs $8.49

Per ounce cost =
`(8.49)/((99)/(4))`

=
`(8.49* 4)/(99)`

= $0.34

For size D -
`30(2)/(3)` or
`(92)/(3)` ounce can for $10.99

Per ounce cost =
`(10.99)/((92)/(3) )`

=
`(10.99* 3)/(92)`

= $0.36

For size C, per ounce cost of the can is the least. Therefore, size C can is the best buy.