What is the meaning of using clause?

What does 21 pilots middle aged name as a band 15 years prior to them naming their band 21 pilots?

You have a small company and want to keep your costs low, but it is important your employees share data. which network would provide you with the most economical solution?

Which of the following best describe how the depth-limited search works. a normal depth-first search is performed but the number of ply/depths is limited. a normal breadth-first search is performed but the number of ply/depths is limited. a normal breadth-first search is performed but values above a specific value will be ignored. a normal depth-first search is performed but values above a specific value will be ignored.