Answer:
Size C can is the best buy.
Step-by-step 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 -
ounce or
ounce can costs $3.49
Therefore, per ounce cost = ![\frac{\text{Total cost}}{\text{Size of can}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BTotal%20cost%7D%7D%7B%5Ctext%7BSize%20of%20can%7D%7D)
= ![\frac{3.49}{\frac{36}{5}}](https://tex.z-dn.net/?f=%5Cfrac%7B3.49%7D%7B%5Cfrac%7B36%7D%7B5%7D%7D)
= ![\frac{3.49\times 5}{36}](https://tex.z-dn.net/?f=%5Cfrac%7B3.49%5Ctimes%205%7D%7B36%7D)
= $0.48
For Size B -
or
ounce can costs $6.49
Per ounce cost = ![\frac{6.49}{\frac{33}{2}}](https://tex.z-dn.net/?f=%5Cfrac%7B6.49%7D%7B%5Cfrac%7B33%7D%7B2%7D%7D)
= ![\frac{6.49\times 2}{33}](https://tex.z-dn.net/?f=%5Cfrac%7B6.49%5Ctimes%202%7D%7B33%7D)
= 0.39
For size C -
ounce or
ounce can costs $8.49
Per ounce cost = ![\frac{8.49}{\frac{99}{4}}](https://tex.z-dn.net/?f=%5Cfrac%7B8.49%7D%7B%5Cfrac%7B99%7D%7B4%7D%7D)
= ![\frac{8.49\times 4}{99}](https://tex.z-dn.net/?f=%5Cfrac%7B8.49%5Ctimes%204%7D%7B99%7D)
= $0.34
For size D -
or
ounce can for $10.99
Per ounce cost = ![\frac{10.99}{\frac{92}{3} }](https://tex.z-dn.net/?f=%5Cfrac%7B10.99%7D%7B%5Cfrac%7B92%7D%7B3%7D%20%7D)
= ![\frac{10.99\times 3}{92}](https://tex.z-dn.net/?f=%5Cfrac%7B10.99%5Ctimes%203%7D%7B92%7D)
= $0.36
For size C, per ounce cost of the can is the least. Therefore, size C can is the best buy.