At Ask.com, we believe questions and answers are forever! We only remove items that violate our Community Guidelines - otherwise, they are here to stay. This benefits not only those people who are reading along right now, but in the future when others search the web for the same information, your contributions today remain in place as a resource for them as well. Therefore, choose your words accordingly. :-)
If you have a specific need for removal of a question or answer, though, you can contact our Customer Support team for further assistance.