Which of the following values is not an irrational number?
pi, the cube root of 48, 9.83 repeating where the 3 is repeating, and the square root of 80
a) 9.83 repeating where the 3 is repeating
b) π
c) the cube root of 48
d) the square root of 80
The cube root of 48 and the square root of 80 are both irrational numbers since they cannot be expressed as a fraction or a repeating decimal. The value 9.83 repeating can be expressed as a repeating decimal, so it is also irrational.
Therefore, the value that is not an irrational number is π, which is a well-known irrational number.
The answer is b) π.