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Rounding to a specified power is very different from rounding to a specified multiple; for example, it is common in computing to need to round a number to a whole power of 2. The steps, in general, to round a positive number x to a power of some positive number b other than 1, are:
Rounding to significant figures is a more general-purpose technique than rounding to n digits, since it handles numbers of different scales in a uniform way. For example, the population of a city might only be known to the nearest thousand and be stated as 52,000, while the population of a country might only be known to the nearest million and ...
Some sources give these numbers rounded to the nearest million or the nearest thousand, while others give them without any rounding. Taking these numbers at face value would be false precision; in spite of being stated to four, seven, or even ten digits, they should not be interpreted as accurate to more than three digits at best (estimates by ...
Rounding to even is normally explained as rounding to the nearest even number without talking about absolute numbers or adding or anything like that. The numbers 0.5 and -0.5 will both round to 0.0 when using round to even, I don't know why you say what you said about it..
In this pricing method, retail prices are often expressed as just-below numbers: numbers that are just a little less than a round number, e.g. $19.99 or £2.98. [1] There is evidence that consumers tend to perceive just-below prices (also referred to as "odd prices") as being lower than they are, tending to round to the next lowest monetary unit.
For the round moons, this mostly matches the Roman numeral designations, with the exceptions of Iapetus and the Uranian system. This is because the Roman numeral designations originally reflected distance from the parent planet and were updated for each new discovery until 1851, but by 1892, the numbering system for the then-known satellites ...
A fixed-point representation of a fractional number is essentially an integer that is to be implicitly multiplied by a fixed scaling factor. For example, the value 1.23 can be stored in a variable as the integer value 1230 with implicit scaling factor of 1/1000 (meaning that the last 3 decimal digits are implicitly assumed to be a decimal fraction), and the value 1 230 000 can be represented ...
The f-number N is given by: = where f is the focal length, and D is the diameter of the entrance pupil (effective aperture).It is customary to write f-numbers preceded by "f /", which forms a mathematical expression of the entrance pupil's diameter in terms of f and N. [1]