To tax or not to tax, is that even a question?

Robin Hood would not even have had to become an outlaw if the markets had been more competitive and Nottingham's taxation office had known how to assess taxes efficiently.

Demystifying DNA hybridization kinetics

Nanoscientists and theoretical physicists at UNSW Medicine & Health's EMBL Australia Node in Single Molecule Science joined forces to demystify the complicated mechanisms governing how quickly two matching strands of DNA ...

New Zealand on verge of wiping out painful cattle disease

New Zealand is on the verge of eradicating a painful disease from its herd of 10 million cattle after a four-year campaign that has cost hundreds of millions of dollars and resulted in more than 175,000 cows being killed.

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In mathematics, a formula (plural: formulae or formulas) is an entity constructed using the symbols and formation rules of a given logical language.

In science, a formula is a concise way of expressing information symbolically (as in a mathematical or chemical formula), or a general relationship between quantities. Colloquial use of the term in mathematics often refers to a similar construct.

Such formulae are the key to solving an equation with variables. For example, determining the volume of a sphere requires a significant amount of integral calculus; but, having done this once, mathematicians can produce a formula to describe the volume in terms of some other parameter (the radius for example). This particular formula is:

Having obtained this result, and knowing the radius of the sphere in question, we can quickly and easily determine its volume. Note that the quantities V, the volume, and r the radius are expressed as single letters. This convention, while less important in a relatively simple formula, means that mathematicians can more quickly manipulate larger and more complex formulae.

Expressions are distinct from formulae in that they cannot contain an equals sign; whereas formulae are comparable to sentences, expressions are more like phrases.

In a general context, formulae are applied to provide a mathematical solution for real world problems. Some may be general: F = ma, which is one expression of Newton's second law, is applicable to a wide range of physical situations. Other formulae may be specially created to solve a particular problem; for example, using the equation of a sine curve to model the movement of the tides in a bay. In all cases however, formulae form the basis for all calculations.

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