Write SQL query to solve given problem: Among the flights with air carrier named Republic Airline, how many of the flights have departure delay of 30 minutes and above?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(*) FROM `Air Carriers` AS T1 INNER JOIN Airlines AS T2 ON T1.Code = T2.OP_CARRIER_AIRLINE_ID WHERE T1.Description LIKE '%Republic Airline%' AND T2.DEP_DELAY > 30