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Is 48 rational or irrational?
No, it is rational.
Is the negative square root of nine rational or irrational?
It is rational. It is rational. It is rational. It is rational.
What is an rational?
"Rational" is an adjective and so there cannot be "a rational" (and certainly not "an rational"). Any answer would depend on whether the question was about a rational number, a rational person, a rational argument or "a rational" combined with some other noun.
What is the least common denominator of 700 and 4?
700 is the smallest number 700 will divide evenly into.700 divided by 4 is 175, so 700 is the LCM of 4 and 700.
Is 12.2882057274 rational or irrational?
12.2882057274 is rational, but it is a rational approximation of an irrational number.Any number that can be expressed exactly as a fraction is rational, and that includes any number that, when written in decimal form, uses a finite number of digits.However, √151 (the square root of 151), which is approximately 12.2882057274445..., is an irrational number. You could keep getting a closer and closer approximation with more and more digits, but you would never hit it exactly, and you will never end up with a repeating series of digits.0.80428571428571428571428571... is also a rational number, because, after the 0.80 at the beginning, you have a repeating sequence of 428571. It's a decimal representation of 563/700.
