576 I hope this help cause I did this two years ago so I'm a little rusty but I think this is correct
Answer:
A. None of these
Step-by-step explanation:
The largest perfect square under 100 would actually be 81 (9 x 9)
90 and 99 are not perfect squares and 64 is smaller than 81.
Answer:
fourth picture
Step-by-step explanation: