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Any number that is presented as an integer "over" (aka divided by) an integer is automatically a rational number - that's what the definition of a rational number is.

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โˆ™ 2010-11-11 03:37:58
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Algebra

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A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

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Q: Is 8 over 21 a rational or irrational number?
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Related questions

Is 21 over the square root of 4 a rational or irrational?

It is equal to 21/2 which is a rational number


Is 21 a rational or irrational number?

21 is a rational number.


Is 21 over 3 a rational or irrational number?

21/3 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.


Is the square root of 21 an irrational or a rational number?

irrational


Is 4.2 an irrational or rational number?

It is rational because it can be expressed as a fraction which is 21/5


Is the square root of 21 a rational number?

No. The square root of an integer is either an integer, or an irrational number.


Is 0.36 rational or irrational?

Rational.


Is 0.21 rational or irrational?

0.21 is a rational number because it can be expressed as a fraction in the form of 21/100


Is 21 out of 71 rational or irrational?

21/71 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.


Is the ratio 21 an integer or an irrational number?

21 is an integer which is also a rational number because it can be expressed as a fraction in the form of 21/1


Is 21 a rational number?

Yes. Any whole number is rational. An irrational number is one that goes on forever without repeating, like √2=1.414213...


Can Adding a rational number to an irrational number give you an irrational number?

You wont be able to add a rational number and an irrational number and get a number not in a fraction ( 3 + 22/7) (21/7 + 22/7 = 43/7) So, yes as you see in the example above it made another irrational number.


Is 21 a rational?

Yes. Any whole number is rational. An irrational number is one that goes on forever without repeating, like √2=1.414213...


The square root of 21 is it rational or irrational?

irrational, it has a never ending decimal


Is the square root of 84 a rational number?

No because it is 2 times the square root of 21 which is an irrational numberThe square root of 84 is not a rational number


Is 8 over 21 a rational number Yes or no?

ANY number that you can write as a fraction (with whole numbers top and bottom) is rational.


Is 21 an irrational number?

No - numbers are neither irrational nor rational.Ans 2Well, it is true that 21 is not irrational.As to being rational, every integer is rational.Proof : Take an integer n, add it to itself.Now look at (n+n)/2. It is obviously rational, but equally obviously it reduces to n.


Is 8 over 21 rational?

Yes, any integer over any other integer (except zero) is always a rational number.


Why is 0.21 a rational number?

0.21 is a rational number because it can be expressed as a fraction in the form of 21/100


Is the square root of 441 a rational number?

Yes because 21 is a rational number


Is the square root of 21 a real number?

Yes, albeit an irrational number


What is the rational number for 0.21?

The number, in the form of a ratio, is 21/100.


What is the rational number for -0.21?

The number, in the form of a ratio, is -21/100.


What is 7 divided by 21 written as a rational number?

0.3333


Does 30 go into 21?

Every rational number "goes into" every other rational number. In this case, the quotient is 0.7 .