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Made in Japan, this was also the first calculator to use an LED display, the first hand-held calculator to use a single integrated circuit (then proclaimed as a "calculator on a chip"), the Mostek MK6010, and the first electronic calculator to run off replaceable batteries. Using four AA-size cells the LE-120A measures 4.9 by 2.8 by 0.9 inches ...
Other achievements of the Islamic period include advances in spherical trigonometry and the addition of the decimal point to the Arabic numeral system. [88] Many notable mathematicians from this period were Persian, such as Al-Khwarizmi , Omar Khayyam and Sharaf al-Dīn al-Ṭūsī . [ 89 ]
Median U.S. household income per County in 2021 Median U.S. household income through 2019 U.S. real median household income reached $63,688 in January 2019, an increase of $171 or 0.3% over one month over that of December 2018. This article is part of a series on Income in the United States of America Topics Household Personal Affluence Social class Income inequality gender pay gap racial pay ...
The magnitude of such precision (152 decimal places) can be put into context by the fact that the circumference of the largest known object, the observable universe, can be calculated from its diameter (93 billion light-years) to a precision of less than one Planck length (at 1.6162 × 10 −35 meters, the shortest unit of length expected to be ...
In 1844, a record was set by Zacharias Dase, who employed a Machin-like formula to calculate 200 decimals of π in his head at the behest of German mathematician Carl Friedrich Gauss. [88] In 1853, British mathematician William Shanks calculated π to 607 digits, but made a mistake in the 528th digit, rendering all subsequent digits incorrect ...
This procedure is illustrated in an ICE table which can also be used to calculate the pH when some additional (strong) acid or alkaline has been added to the system, that is, when C A ≠ C H. For example, what is the pH of a 0.01M solution of benzoic acid, pK a = 4.19? Step 1: = =
As a percentage of all US adults, 3.1% identify as bisexual, 1.4% as gay, 0.7% as lesbian, and 0.6% as transgender. [ 63 ] According to a 2021 report from the Human Rights Campaign (HRC), "at least 20 million adults in the United States could be lesbian, gay, bisexual or transgender people."
The Hatter's hat shows an example of the old pre-decimal notation: the hat costs 10/6 (ten shillings and sixpence, a half guinea). Before decimalisation in 1971 , the pound was divided into 20 shillings , and each shilling into 12 pence , making 240 pence to the pound.