Answer: this is our required factor i.e.

Explanation:
Since we have given that

As we know the identity , which says that

So, we can use this here ,

Hence this is our required factor i.e.

2/5*1/2=2/10
his neighbor will get 2/10quart or 0.2quarts of jelly
You have to enter them into a calculator and graph it on the calculator