Drag and drop each number into the correct box to tell wheter it is rational or irrational

Haven't you tried to answer these yourself?

Let me give you 2 examples:

First:  The product of sqrt(2) and sqrt(25) is 5sqrt(2), which is irrational because sqrt(2) is irrational.

Second:  2pi*r evaluated at pi^(-1) is rational because pi/pi = 1 and 2 itself is rational.

Bis the correct answer

The answer is b: step 2.