Pls help I’ll brainlest and add extra points

Answer:
The third one is a rational number
Step-by-step explanation:
This is because the square root of 36 is 6 and the square root of 225 is 15. So the simplified problem for 3 is 6/15 or 2/5
Answer: The rational number is at 3)
Step-by-step explanation:
1), 2) and 4) - not rational