I believe you would use the semicolon. I'm not totally sure. ( ; )
The reciprocal is when you flip a fraction. So the reciprocal would be 10/7.
Can you at least put a picture or write some of the paragraphs that showed a bit of the grandmothers opinion about there vacation that would help me and answer that question that your stuck on.
To cook is an infinitive. anything with to then an action is an infinitive