Final answer:
By dividing 28 ounces of almonds by 4 and then adding 11 ounces, we find that the last bag contains a total of 18 ounces of almonds.
Step-by-step explanation:
To determine how many ounces of almonds are in the last bag Noisabell has, we need to solve the equation 28 ÷ 4 + 11 = a.
First, we divide 28 ounces by 4 to find out how many ounces are in each of the first three bags.
That gives us 7 ounces per bag.
Next, we add the additional 11 ounces to the amount in the last bag.
So, we have 7 + 11, which equals 18 ounces.
Therefore, the total number of ounces of almonds in the last bag is 18 ounces.