CREATE TABLE table_38542 ("Island's Name" TEXT, "Area  ( sq mi ) " FLOAT, "Area  ( km 2  ) " FLOAT, "Location" TEXT, "Population  ( 2000 ) " TEXT)

What is the smallest area with 45 population?
SELECT MIN("Area (km 2 )") FROM table_38542 WHERE "Population (2000)" = '45'
SELECT MIN("Area (km 2 )") FROM "table_38542" WHERE "Population (2000)" = '45'