Context: CREATE TABLE table_name_45 (rank INTEGER, population_density___km_2__ VARCHAR, _percentage_growth__2006_11_ VARCHAR)
Question: What was the highest rank of an area with a population density larger than 5.7 and a 2006–2011 percentage growth of 5.7%?
Answer: SELECT MAX(rank) FROM table_name_45 WHERE population_density___km_2__ > 5.7 AND _percentage_growth__2006_11_ = "5.7%"