Answer: There were about 259 principals in attendance
Explanation: The total number of principals in attendance at the conference can be estimated using the ratio of principals to teachers that was observed in the exhibit room. The ratio of principals to teachers in the exhibit room was 14:46, or 1 principal for every 3.29 teachers. Therefore, if the same ratio were to hold true for the entire conference, then there would be approximately 260 principals in attendance.