Final answer:
The specific attendance number at the 2012 National FFA Convention is not provided in the materials, but these events usually have tens of thousands of attendees.
Step-by-step explanation:
The student is asking about the attendance at the National FFA Convention in 2012. Unfortunately, the materials provided do not contain the specific number for the 2012 convention attendance. The National FFA Organization is an American youth organization that promotes agricultural education through events like its annual convention. Based on historical attendance numbers, these conventions typically attract tens of thousands of members, advisors, and guests. For an exact figure, it would be best to consult the National FFA Organization's records or official reports from 2012.