Which number is an irrational number?

a) square root of 100

b) 1/8

c) - 2.2675

d) exponent 3 square root of 16

1. To solve this problem, you must keep on mind the followinwg information:

You know that, by definition, an irrational number is a number that cannot be expressed as a fraction.

2. Therefore, the correct answer is the option D.

3. To verify the answer you have:

∛16=2.51

As you can see, the result is 2.51 and the decimal number 2.51 cannot be expressed as a fraction.