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Middle gray. 50% CIELAB lightness. ( Y = 18.4%) In photography, painting, and other visual arts, middle gray or middle grey is a tone that is perceptually about halfway between black and white on a lightness scale; [1] in photography and printing, it is typically defined as 18% reflectance in visible light. [2] [3]
At the conclusion of its third rate-setting policy meeting of the year on May 1, 2024, the Federal Reserve left the federal funds target interest rate at a 23-year high of 5.25% to 5.50%, marking ...
At the conclusion of its fourth rate-setting policy meeting of 2024 on June 12, 2024, the Federal Reserve kept the federal funds target interest rate steady at a 23-year high of 5.25% to 5.50% ...
In voting to keep the policy rate steady in the 5.25%-5.50% range where it has now been for a year, "participants noted that progress in reducing inflation had been slower this year than they had ...
A liquid just alcoholic enough to maintain combustion was defined as 100 proof and was the basis for taxation. Because the flash point of alcohol is highly dependent on temperature, 100 proof defined this way ranges from 20% at 36 °C (97 °F) to 96% at 13 °C (55 °F) alcohol by weight; at 24 °C (75 °F) 100 proof would be 50% ABW.
ED 50. The median effective dose is the dose that produces a quantal effect (all or nothing) in 50% of the population that takes it (median referring to the 50% population base). It is also sometimes abbreviated as the ED 50, meaning "effective dose for 50% of the population". The ED50 is commonly used as a measure of the reasonable expectancy ...