Final answer:
After subtracting the leftover salt from the total amount, the result is divided by the amount each jar holds. Mr. Barrows can fill 3 jars with the salt provided.
Step-by-step explanation:
The student asked how many jars Mr. Barrows can fill with 1/2 cups of salt if each jar contains 1/13 cup, and there's 1/4 cup of salt left over. To solve this, we'll subtract the leftover amount from the total amount of salt, then divide the result by the amount each jar can hold.
Total salt amount without leftovers: 1/2 cup - 1/4 cup = 1/4 cup.
Now, divide this by the amount that goes into one jar: 1/4 cup / 1/13 cups per jar = 13/4 jars.
However, since you can't have a fraction of a jar, we would only count the whole jars, which is 3 jars with a remainder that was part of the initial leftover amount.