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Q: Is 3 times pi a rational or an irrational?

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No; since pi is irrational if you multiply it by a rational number it is still irrational

No, 3 is a rational number. Pi and the square root of 2 are irrational numbers.

Pi, is an irrational number (it cannot be written as a fraction) For this reason, 3 times pi is also irrational.

Yes if the diameter is rational. But it need not be if the diameter is irrational. If the diameter is 3/pi units, for example, then the circumference will be (3/pi)*pi = 3 units.

pi is a transcendental (a special type of irrational) number whereas 3 is not only rational, but an integer.pi is a transcendental (a special type of irrational) number whereas 3 is not only rational, but an integer.pi is a transcendental (a special type of irrational) number whereas 3 is not only rational, but an integer.pi is a transcendental (a special type of irrational) number whereas 3 is not only rational, but an integer.

Since pi is irrational, any multiple of it is too.

Yes, multiplying a rational and an irrational number gives an irrational product. For example 3 * pi = 3pi = 9.424789... or 2 * sqrt 2 = 2^(3/2).

Rational. Rational. Rational. Rational.

No, it is not.

Rational because it can be simplified into -3/50. Irrational numbers are decimals that go on forever. For example, pi 3.141592653... goes on forever.

Pi is an irrational number. A rational number is one that can be expressed as a fraction (or ratio), e.g. 1/3. There are fractions that are near Pi, for example: 22/7 = 3.142857 (PI = 3.14159265...) A closer fraction is: 355/113 = 3.14159292 However whatever fraction you have, you will never get exactly PI. Hence it is irrational See the links for proofs that pi is irrational.

Some are and some aren't. 62 is real and rational. 1/3 is real and rational. sqrt(2) is real and irrational. (pi) is real and irrational.

3 is rational.

Yes, numbers fall into two categories rational and irrational. Rational: Fractions Terminating Decimals Integers Irrational: Pi The square root of 2 The square root of 3 Infinity

Rational -1.(3 repeating) Any repeating decimals are rational. However, a number such as pi (3.141592654...) does not repeat or end.

If it would never end, then it is irrational e.g. 10/3 = 3.33333333... etc.. if it ends it's rational e.g. 1000/8 = 125 other irrational numbers: pi, e

A rational number can be expressed as a fraction, so any fraction is a rational number e.g. 3/4 A irrational number can NOT be expressed as a fraction. e.g. sqrt(2), pi

rational because you can simplify the square root to 3 which is the quotient. Pi is probably the most well known irrational number out there. Improved Answer:- Pi is an irrational number because like all irrational numbers they can't be expressed as fractions.

-3 is a rational number

You can multiply any pair of rational numbers as well as any irrational number and its reciprocal (or a rational multiple of its reciprocal. Thus pi * 3/7*(1/pi) is rational.

The number 3 is a rational number (as is any integer).

No

3 is a rational number.

-3 is a rational number

The square root of 2 is irrational; this is proven in many high school algebra books. The same proof can be applied to any natural number that is not a perfect square; that is, the square roots of 3, 5, 6, 7, 8, 10, 11, 12, ... are all irrational.