Which number is an irrational number?

(square root) 100, 1/8, - 2.2675, 3 (square root) 16

A) the square root of 100 is 10 and that is rational

b) 1/8 - 2.2675 can be written as a fraction so that is rational

c) 16 is not a perfect square so therefore the root of it will be irrational, regardless of what is being multiplied to it.

c) is correct

-2.2675 ... irrational numbers are those that aren't fractions or whole numbers