A formula is a rule that links variables and can be written using mathematical symbols. Substitute the given values for the length of one side (12) and the number of sides (5). Follow the formula ...

Excel has over 475 formulas in its Functions Library, from simple mathematics to very complex statistical, logical, and engineering tasks such as IF statements (one of our perennial favorite stories); ...

Jonathan Borwein (Jon) receives funding from the Australian Research Council. Often described as “the most beautiful formula in mathematics”, Euler seems never to have actually written it down – ...