I got this wrong, how do I solve it?

A rotating space station is said to create "artificial gravity"a loosely-defined term used for an acceleration that would be crudely similar to gravity. The outer wall of the rotating space station would become a floor for the astronauts, arid centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength rnore naturally than in non-rotating space environments. It the space station is 173 m in diameter, what angular Velocityr would produce an "artificial gravity" of 9.80 In];2 at the rim