Answer:
see the explanation
Step-by-step explanation:
The complete question is
A certain shampoo is available in two sizes. A 12.6 -ounce bottle costs $2.97 . A 22.8 -ounce bottle costs $4.97 . Find the unit price for each size. Then state which size is the better buy based on the unit price.
we know that
To find the unit rate, divide the total cost of the bottle by the weight of the bottle
so
step 1
Find the unit rate of the 12.6 -ounce bottle
The unit rate is
[tex]\frac{2.97}{12.6}= \$0.24\ per\ ounce[/tex]
step 2
Find the unit rate of the 22.8 -ounce bottle
The unit rate is
[tex]\frac{4.97}{22.8}= \$0.22\ per\ ounce[/tex]
step 3
Compare the unit prices
[tex]\$0.22\ per\ ounce < \$0.24\ per\ ounce[/tex]
therefore
The 22.8 -ounce bottle is the better buy based on the unit price, because its unit price is less than the unit price of the 12.6 -ounce bottle
