I was reading a book at the library this morning about the 100 best jobs without a four year college degree, and I was reading about tile setting. The book had sections for each job, and one section was about the skills that tile setters use. This book said that tile setters can use calculus on the job. I have worked as an assistant to a tile setter for a year, and a person can definitely be an outstanding tile setter without knowing anything about calculus. What applications does calculus possibly have for floor tile setting? I'm talking about any type of floor tile: ceramic, porcelain, natural stone, glass, etc.