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Comparison of 1 square foot with some Imperial and metric units of area. The square foot (pl. square feet; abbreviated sq ft, sf, or ft 2; also denoted by ' 2 and ⏍) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States, Canada, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar, Singapore and Hong Kong.
One square vara equals 0.6987 square meters (7.521 sq ft), while one manzana equals 6,987 square metres (1.727 acres). [2] The term cuerda can refer to areas of different sizes. Cuerdas can refer to areas that are 50 x 50, 40 x 40, 30 x 30, 25 x 25 or 20 x 20 varas (i.e. 2500, 1600, 900, 625, or 400 square varas). [3]
In Guatemala, a cuerda is a traditional unit of distance, equal to exactly 25 varas [1] or almost 21 meters (nearly 69 feet). During 19th-century Spain, a cuerda was a unit of length, of nearly 6.889 m (approx. 7.554 yd). [2] However, in Valencia, Spain, the cuerda measured 40 varas, over 5.4 times longer, as nearly 37.21 m (approx. 40.7 yd). [2]
1.076 × 10 −3 phots A foot-candle (sometimes foot candle ; abbreviated fc , lm/ft 2 , or sometimes ft-c ) is a non- SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot.
As of 2020, it is not known if 2-mixing implies 3-mixing. (If one thinks of ergodicity as "1-mixing", then it is clear that 1-mixing does not imply 2-mixing; there are systems that are ergodic but not mixing.) The concept of strong mixing is made in reference to the volume of a pair of sets.
A distinction needs to be made between a random variable whose distribution function or density is the sum of a set of components (i.e. a mixture distribution) and a random variable whose value is the sum of the values of two or more underlying random variables, in which case the distribution is given by the convolution operator.
It can shrink 1 ⁄ 16 inch (1.6 mm) over a 10-foot long area (3.05 meters). This causes stress internally on the concrete and must be accounted for by the engineers and finishers placing the concrete, and may require the use of steel reinforcement or pre-stressed concrete elements where this is critical.
A manzana is a unit of area used in Argentina and in many Central American countries, originally defined as 10,000 square varas in Spanish customary units. [1] In other Spanish-speaking regions, the term has the meaning of a city block. [2] Plan of the health area of the Universidad de Antioquia, Medellín, Colombia [a]