Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Sometimes external forces in the economy throw the supply and demand for a product or service out of whack. Trade quotas are a common and powerful example of one such external force. One way ...

Learn how Hubble is measuring the expansion rate of the Universe in this new explainer from NASA's Goddard Space Flight ...

Unanet's Kim Koster explains how Probability of Award helps GovCons move from intuition to data-driven forecasting and ...

To calculate your average trade price, add all purchase prices and divide by the number of trades. Use weighted average trade price calculation if share quantities vary per purchase. Weighted averages ...

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