The best answer is, "A". 'So they can be quickly and easily referenced.' It is important to have formulas separate, just to make sure that they correspond with certain problems, how to use them, etc.
Formulas are written separately from other information in research papers, technical briefs and books so that they can be quickly and easily referenced and the numbers in the formulas aren’t confused with page numbers for other topics. This is especially common and useful in text related to mathematics, physics and engineering.
this seems like an opinion question and there's no context, but the definition of democracy is that everyone has equal voting rights. democracy has nothing to do with having food clothing and shelter
