Question

What type of number is -√81.

Choose all answers that apply:
A: Whole number
B: Integer
C: Rational
D: Irrational

Answer 1

-√81 is an integer, rational, and irrational number.

Step-by-step explanation:

-√81 is an integer, rational, and irrational number.

An integer is a whole number that can be positive, negative, or zero. In this case, -√81 is a negative integer because it is the square root of 81 and is negative.

A rational number is a number that can be expressed as a fraction of two integers. In this case, -√81 can be written as -9/1, so it is a rational number.

An irrational number is a number that cannot be expressed as a fraction and has an infinite number of non-repeating decimals. In this case, -√81 is -9, which is a finite decimal, so it is not an irrational number.