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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.
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Is the square root of -81 rational or irrational?
Since it is the square root of a negative number, it is actually imaginary, neither rational nor irrational. It is equal to 9i, or 9 times whatever the square root of negative one is.square root of -81 = square root of 81 times i = 9i
Which number produces an irrational number when multiplied by?
At least one of the factors has to be irrational.* An irrational number times ANY number (except zero) is irrational. * The product of two irrational numbers can be either rational or irrational.
Is 4.121314 is a rational number or irrational?
it is a rational number but 4.121314..... is an irrational no
What is an irrational number minus a rational number?
It is an irrational number.
What number do you get when you add an irrational and a rational number?
An irrational 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 the root of 81 an irrational number?
No. The square root of 81 is 9, which is a rational number.
Is the square root of 81 an irrational number?
No.
Is sqrt 81 a irrational number?
No because the square root of 81 is 9 which is a rational number
Is 81 a rational or irrational number?
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…
Is the number 81 irrational?
No - because it can be represented as a ratio of integers : 81 = 81/1 Any number that can be represented as a ratio of 2 integers is classified as a rational number (other than that you can't use 0 for the denominator)
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 the square root of of 81 over negative three irrational?
No. The square root of 81/(-3) is rational. The square root of [81/(-3)] is imaginary (a kind of complex number).
Is the square root of -81 rational or irrational?
Since it is the square root of a negative number, it is actually imaginary, neither rational nor irrational. It is equal to 9i, or 9 times whatever the square root of negative one is.square root of -81 = square root of 81 times i = 9i
Is the square root of 81 irrational?
no. it is 9
Is 39.81 with a line over 81 irrational?
No, it is rational.
What is the sum of an rational number and irrational number?
An irrational number.
