Mia can purchase a 40-ounce jar of peanut butter for $5.20 or a 15-ounce jar for $2.70. How much does Mia save per ounce by buying the 40-ounce jar?
5.20/40 = 13 cents/oz
2.70/15 = 18 cents/oz
difference = 5 cents/ oz
The difference is 5 cents
5(−6)
To find out how much Mia saves per ounce by buying the 40-ounce jar, we need to calculate the cost per ounce for each jar.
First, let's find the cost per ounce for the 40-ounce jar. We divide the total cost of the jar by its size:
Cost per ounce for the 40-ounce jar = $5.20 / 40 ounces
Next, let's find the cost per ounce for the 15-ounce jar. Again, we divide the total cost of the jar by its size:
Cost per ounce for the 15-ounce jar = $2.70 / 15 ounces
Now that we have calculated the cost per ounce for each jar, we can find the difference in cost per ounce. Subtract the cost per ounce of the smaller jar (15-ounce) from the cost per ounce of the larger jar (40-ounce):
Difference in cost per ounce = Cost per ounce for the 40-ounce jar - Cost per ounce for the 15-ounce jar
This difference in cost per ounce represents the amount Mia saves per ounce by buying the 40-ounce jar.