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One important invention that resulted from the discovery of the mineral acids is aqua regia, a mixture of nitric acid and hydrochloric acid in a 1:3 proportion, capable of dissolving gold. This was first described in pseudo-Geber 's De inventione veritatis ("On the Discovery of Truth", after c. 1300 ), where aqua regia was prepared by adding ...
Fitzroy Island, one of the 600 islands within the main archipelago of the Great Barrier Reef. The Great Barrier Reef, the world's largest coral reef, lies a short distance off the north-east coast and extends for over 2,000 km (1,200 mi). Mount Augustus, claimed to be the world's largest monolith, is located in Western Australia.
A confidence interval for the parameter , with confidence level or coefficient , is an interval determined by random variables and with the property: The number , whose typical value is close to but not greater than 1, is sometimes given in the form (or as a percentage ), where is a small positive number, often 0.05.
Monty Hall problem. In search of a new car, the player chooses a door, say 1. The game host then opens one of the other doors, say 3, to reveal a goat and offers to let the player switch from door 1 to door 2. The Monty Hall problem is a brain teaser, in the form of a probability puzzle, based nominally on the American television game show Let ...
History 1983–1991: early years. AOL began in 1983, as a short-lived venture called Control Video Corporation (CVC), founded by William von Meister.Its sole product was an online service called GameLine for the Atari 2600 video game console, after von Meister's idea of buying music on demand was rejected by Warner Bros. Subscribers bought a modem from the company for $49.95 and paid a one ...
Facebook's initial public offering came on May 17, 2012, at a share price of US$38 ($50.00 in 2023 dollars). The company was valued at $104 billion ($138 billion in 2023 dollars [20] ), the largest valuation to that date.