Answer:
C, 1 and 2.
Step-by-step explanation:
The square root of 81 repeating is 9.05, (Rounded)
-It goes on forever.
Since it goes on forever, it's not a whole number or a natural number, both kind of numbers never keep going on forever.
Which leaves us with Irrational and Real Numbers
Therefore, 1 and 2 is your answer.
Best of Luck to you.
If you have any questions, or need more info, feel free to comment below.
Happy New Year!
