Answer:
Im in middle school
Step-by-step explanation: I have no clue how to help u and bc I have no idea how brainy works -_-
The answer is 31.42 since the radius is five and then you multiply it times squared and then times 3.14
Solution:
A perfect square is a number that can be expressed as the product of an integer by itself or as the second exponent of an integer.
Hence, the number that can be expressed as a product of an integer by itself is;

Therefore, the perfect square is 81.
OPTION B is correct.