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...
phi = [1+sqrt(5)]/2 sqrt(5) is irrational and so phi is irrational.
It is real and irrational.
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.
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.
I would answer no because 3√2 ____ 5√2 Would simplify to 3 divided by 5 and that is not irrational.
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!
No
no
phi = [1+sqrt(5)]/2 sqrt(5) is irrational and so phi is irrational.
It is real and irrational.
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.
5.4 = 5 2/5 = 27/5 so it is a rational number.
It is rational
5 isn't a irrational number.
No. Any fraction with integers in the numerator and in the denominator is, by definition, RATIONAL.
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.
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.