table: 1-1012730-1
columns: Year, Starts, Wins, Top 5, Top 10, Poles, Avg. Start, Avg. Finish, Winnings, Position, Team(s)
Q: How many top tens had an average start of 29.4?
A: SELECT COUNT Top 10 FROM 1-1012730-1 WHERE Avg. Start = '29.4'