Question

what is the unit rate for each size of peanut butter regular size $per. oz. regular size 16 oz price 3.36

Answer 1

You see in the table given in the exercise, that a Regular size of peanut butter has 16 ounces and it costs $3.36.

In order to calculate the unit rate of this regular size, you must divide $3.36 by 16 ounces.

Let be "r" the unit rate for the Regular size. This is:

`\begin{gathered} r=(3.36dollars)/(16ounces) \\ \\ r=0.21(dollars)/(ounce) \end{gathered}`

According to the table, the Family size has 40 ounces and it costs $7.60.

Let be "f" the the unit rate for the Family size.

Dividing $7.60 by 40 ounce, you get that the value of "f" is the following:

`\begin{gathered} f=(7.60dollars)/(40ounces) \\ \\ f=0.19(dollars)/(ounce) \end{gathered}`

Based on the results obtained, you can determine that Family size is the better buy.

The answers are

Regular: $0.21 dollars per ounce.

Family size: $0.19 dollars per ounce.

Family size is the better buy.