What is the total rank of the airport that has 79,290 passengers?
CREATE TABLE "busiest_domestic_routes_from_lex_april_2" (
  "rank" real,
  "city" text,
  "airport" text,
  "passengers" real,
  "carriers" text
);
SELECT COUNT("rank") FROM "busiest_domestic_routes_from_lex_april_2" WHERE "passengers"='79,290';