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The square root of 7 is an irrational number, so its decimal expansion never ends and never repeats. Rounded to 3 decimal places it is 2.646.
Pi, and the square root of pi, belong to a category known as transcendental numbers, which means that not only do they have an infinite decimal expansion (the numbers following the decimal go on forever) but the decimal expansion follows no pattern and is unpredictable. Irrational numbers also have an infinite decimal expansion, but not necessarily an unpredictable one.
There is no whole number that is the square root of 286. The decimal is around 16.91.
The square root of 325, 18.027756377319946465596106337352…, is an irrational number because its decimal expansion is nonterminating and nonperiodic.
3.3 IS THE square ROOT of 11 to one decimal place