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A method analogous to piece-wise linear approximation but using only arithmetic instead of algebraic equations, uses the multiplication tables in reverse: the square root of a number between 1 and 100 is between 1 and 10, so if we know 25 is a perfect square (5 × 5), and 36 is a perfect square (6 × 6), then the square root of a number greater than or equal to 25 but less than 36, begins with ...
Normal distributions form an exponential family with natural parameters = and =, and natural statistics x and x 2. The dual expectation parameters for normal distribution are η 1 = μ and η 2 = μ 2 + σ 2 .
In mathematics, the prime-counting function is the function counting the number of prime numbers less than or equal to some real number x. [1] [2] It is denoted by π(x) (unrelated to the number π). A symmetric variant seen sometimes is π 0 (x), which is equal to π(x) − 1 ⁄ 2 if x is exactly a prime number, and equal to π(x) otherwise.
Elon Reeve Musk (/ ˈ iː l ɒ n / EE-lon; born June 28, 1971) is a businessman known for his key roles in Tesla, Inc., SpaceX, and Twitter (which he rebranded as X).Since 2025, he has been a senior advisor to United States president Donald Trump and de facto head of the Department of Government Efficiency (DOGE).
29.2 2021 Switzerland: Western Europe: High income 33.7 2020 33.82 2021 Chile: South America: High income 43.0 2022 44.50 2022 44.8 2022 China: Eastern Asia: Upper middle income 35.7 2021 36.67 2020 Ivory Coast: Western Africa: Lower middle income 35.3 2021 37.17 2019 Cameroon: Middle Africa: Lower middle income 42.2 2021 46.64
Country 2022 [1] 2021 [1] 2020 [1] 2019 [1] 2018 [1]; World 1,163.5 (1,282.5; 1,145.1) 1,208.0 (1,331.6; 1,188.9) 1,155.8 (1,274.1; 1,137.5) 1,137.7 (1,254.1; 1,119.7 ...
Apple M2 is a series of ARM-based system on a chip (SoC) designed by Apple Inc., launched 2022 to 2023.It is part of the Apple silicon series, as a central processing unit (CPU) and graphics processing unit (GPU) for its Mac desktops and notebooks, the iPad Pro and iPad Air tablets, and the Vision Pro mixed reality headset.
7.2 1.37 2005 [3] DR Congo [a] 26.2: 21.0 23.6 5.2 1.25 2019 [3] Djibouti: 31.3: 27.4 29.4 3.9 1.14 2009 [2] Egypt : 30.5: 25.5 28 5 1.2 2020 [4] Equatorial Guinea: 26.1: 20.5 23.3 5.6 1.27 2011 [2] Eritrea: 29.1: 20.6 24.9 8.5 1.41 2002 [2] Eswatini: 30.5: 26.5 28.5 4 1.15 2007 [2] Ethiopia: 26.8: 22.3 24.6 4.5 1.2 2019 [2] Gabon [a] 25.5: 21. ...