CREATE TABLE table_24642 ("Year" FLOAT, "Starts" FLOAT, "Wins" FLOAT, "Top 5" FLOAT, "Top 10" FLOAT, "Poles" FLOAT, "Avg. Start" CLOB, "Avg. Finish" CLOB, "Winnings" CLOB, "Position" CLOB, "Team ( s ) " CLOB)

How many different teams had an average start of 12.9?
SELECT COUNT("Team(s)") FROM table_24642 WHERE "Avg. Start" = '12.9'
SELECT COUNT("Team(s)") FROM "table_24642" WHERE "Avg. Start" = '12.9'