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No, actually 2/5 is equal to .4 which is perfectly rational. Irrational Numbers have an infinitely long decimal expansion. This is just one digit.
Any rational number divided by any other rational number gives another rational number. Having an infinitely long decimal expansion is a necessary but not sufficient criterion for irrationality... for example, 1/3 is rational, though its decimal expansion is the infinitely long 0.33333333...
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Why is phi an irrational number?
phi = [1+sqrt(5)]/2 sqrt(5) is irrational and so phi is irrational.
Is the square root of 1 over 5 a real number and is it rational or irrational?
It is real and irrational.
Is 2 5 an irrational number?
No, 2/5 is a rational number because it can be expressed as a ratio of two integers. An irrational number cannot be expressed as a fraction.
What is an irrational number between 5 and 7?
4*sqrt(2) Rational multiples of irrational numbers are irrational. sqrt(2) is about 1.414, and 5/4 = 1.25 < 1.414... < 1.75 = 7/4 so 4*sqrt(2) is between 5 and 7, and is irrational.
Is 3 times the square root of 2 divided by 5 times the square root of 2 an irrational number why or why not?
I would answer no because 3√2 ____ 5√2 Would simplify to 3 divided by 5 and that is not irrational.
How can be the product of 2 irrational numbers a rational numbers 5?
5*sqrt(2) is one irrational number. 1/sqrt(2) is another irrational number.Their product is 5!5*sqrt(2) is one irrational number. 1/sqrt(2) is another irrational number.Their product is 5!5*sqrt(2) is one irrational number. 1/sqrt(2) is another irrational number.Their product is 5!5*sqrt(2) is one irrational number. 1/sqrt(2) is another irrational number.Their product is 5!
Is -5 over 6 an irrational number?
No
Is 36 over 5 an irrational number?
no
Why is phi an irrational number?
phi = [1+sqrt(5)]/2 sqrt(5) is irrational and so phi is irrational.
Is the square root of 1 over 5 a real number and is it rational or irrational?
It is real and irrational.
Is 2 5 an irrational number?
No, 2/5 is a rational number because it can be expressed as a ratio of two integers. An irrational number cannot be expressed as a fraction.
Is 5.4 an irrational or rational number?
5.4 = 5 2/5 = 27/5 so it is a rational number.
Is 2 over 5 rational or irrational?
It is rational
Is 5 irrational number?
5 isn't a irrational number.
Is 6 over 5 irrational?
No. Any fraction with integers in the numerator and in the denominator is, by definition, RATIONAL.
Is a percent number an irrational number?
A percent can be represented as a fraction of x/100, and so is not irrational, unless the numerator of the fraction (the # before the %) is itself irrational. For example: 2% is not irrational. 55.443% is not irrational. sqrt(5)% is irrational.
Is 1/5 irrational number?
No. Irrational numbers can not be expressed as a ratio between two integers.
