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Billion is a word for a large number, and it has two distinct definitions: 1,000,000,000 , i.e. one thousand million , or 10 9 (ten to the ninth power ), as defined on the short scale . This is now the most common sense of the word in all varieties of English; it has long been established in American English and has since become common in ...
For instance, according to the prevailing Big Bang model, our universe is approximately 13.8 billion years old (equivalent to 4.355 × 10^17 seconds). The observable universe spans an incredible 93 billion light years (approximately 8.8 × 10^26 meters) and hosts around 5 × 10^22 stars, organized into roughly 125 billion galaxies (as observed ...
Each of these words translates to the American English or post-1974 British English word billion (10 9 in the short scale). The term billion originally meant 10 12 when introduced. [7] In long scale countries, milliard was defined to its current value of 10 9, leaving billion at its original 10 12 value and so on for the larger numbers. [7]
Decimalisation or decimalization (see spelling differences) is the conversion of a system of currency or of weights and measures to units related by powers of 10.. Most countries have decimalised their currencies, converting them from non-decimal sub-units to a decimal system, with one basic currency unit and sub-units that are valued relative to the basic unit by a power of 10, most commonly ...
There are one billion cubic millimetres in a cubic metre, and a billion cubic metres in a cubic kilometre. A billion grains of table salt or granulated sugar would occupy a volume of about 2.5 cubic feet (0.071 m 3). A billion cubic inches would be a volume comparable to a large commercial building slightly larger than a typical supermarket.
Floating-point arithmetic is needed for very large or very small real numbers, or computations that require a large dynamic range.Floating-point representation is similar to scientific notation, except computers use base two (with rare exceptions), rather than base ten.
However, these somewhat rare names are considered acceptable for approximate statements. For example, the statement "There are approximately 7.1 octillion atoms in an adult human body" is understood to be in short scale of the table below (and is only accurate if referring to short scale rather than long scale).
A billion is called arab (ارب), and one hundred billion/arab is called a kharab (کھرب). Lakh has entered the Swahili language as "laki" and is in common use. Formal written publications in English in India tend to use lakh/crore for Indian currency and International numbering for foreign currencies. [7]