CREATE TABLE table_name_36 (rank INT, notes VARCHAR, time VARCHAR)

What is the rank of the athletes that have Notes of fb, and a Time of 6:47.30?
SELECT SUM(rank) FROM table_name_36 WHERE notes = "fb" AND time = "6:47.30"
SELECT SUM("rank") FROM "table_name_36" WHERE "6:47.30" = "time" AND "fb" = "notes"