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81 as well as all whole numbers are rational numbers. Any number that can be written as a fraction is a rational number. An irrational number can be written as a decimal, but not as a fraction.
An irrational number has endless non-repeating digits to the right of the decimal point. An example of an irrational number would be pi:
π = 3.141592…
What else can I help you with?
Is the root of 81 an irrational number?
No. The square root of 81 is 9, which is a rational number.
Is 10.01 a rational or irrational number?
10.01 is a rational number
Is 37.5 a rational or irrational number?
Rational
Is the product of a rational number and an irrational number rational or irrational?
Such a product is always irrational - unless the rational number happens to be zero.
The sum of a rational number and an irrational number is?
The sum of a rational and irrational number must be an irrational number.
Is the root of 81 an irrational number?
No. The square root of 81 is 9, which is a rational number.
Is -81 an irrational number?
No, -81 is not an irrational number because it can be represented in the form x/y = -81
Is 81 a irrational number?
No. 81 is a rational number. An irrational number is a number with an endless amount of digits like pi or the square root of 2.
Is sqrt 81 a irrational number?
No because the square root of 81 is 9 which is a rational number
Is -81 is rational or irrational?
81*81 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
Is 10.01 a rational or irrational number?
10.01 is a rational number
Is 37.5 a rational or irrational number?
Rational
Is 0.05 a rational or irrational number?
It is a rational number.
Is 34.5 rational or irrational?
is 34.54 and irrational or rational. number
Is 4.121314 is a rational number or irrational?
it is a rational number but 4.121314..... is an irrational no
When an irrational number is divided by a rational number is the quotient rational or irrational?
Irrational.
Is the product of a rational number and an irrational number rational or irrational?
Such a product is always irrational - unless the rational number happens to be zero.
