Answer:
A rational number is a number with a finite number of numbers after the decimal point, or the numbers after the decimal point repeat a given patern.
An irrational number is a number with infinite numbers afther the decimal point, and those numbers have no pattern, are all "random", some examples are the roots of prime numbers, like square root of 2.
1) 0.329
It has a finite quantity of numbers after the decimal point: rational
2) 127.5
It has a finite quantity of numbers after the decimal point: rational
3) -89
It has a finite quantity of numbers after the decimal point: rational
4) [tex]\sqrt{101[/tex]
101 is a prime number, so the square root of 101 must be a irrational number.
