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A repeating decimal is represented by a horizontal line over the repeating part.So for example .3255555555..... would be __.3255and .33333333..... would be __.33
It represents a repeating decimal
If a non-zero rational number, in its simplest form, has a denominator with any factor other than 2 or 5, the ratio cannot be represented by a terminating decimal. So, repeating decimals are used to represent the vast majority of rational numbers.
As written it is a terminating decimal. However, if the digits 123456789101112 keep on repeating after the amount written (normally it would be written with a dot over the first 1 and the last 2; as that is impossible here, to show repeating an ellipsis (three dots) could be used, as in: 0.123456789101112123456789101112... to show that it goes on) then it is a repeating decimal.
The term used is pi
The term solution can be used to identify a mixture that has the same composition throughout.
The term gas can not be used to identify a mixture that has the same composition throughout. Gas is a state of matter.
Element
The term I learned was "vinculum." The same term (and symbol) has other meanings in mathematics as well; as far as I know there isn't a specific term that ONLY means the bar used to indicate a repeating decimal.
Functional Baseline
Repeat testing
It's known as a composition or composite object, however the term aggregate can also be used.
No, it is a noun. But it may be used as a noun adjunct in terms such as baseline studies.
Yes. Felsic is a term used to describe the composition of some igneous rocks.
This term is often used with electronics and engineering. By definition, the recovery time of a sensor is the time a sensor takes to return to a baseline value after an event.
The bar is only used for repeating decimals. If it is repeating, you can use it.
Depends on the process but "period" is a generally accepted term - although this is usually used to describe a cyclical (repeating) process.