Respuesta :
Answer:
c
Step-by-step explanation:
In mathematics, a square number or perfect square is an integer that is the square of another integer, or the product of two integers. For example, nine is a square number since it is equivalent to 32 and maybe three.
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Square Number.
Number Square
7 49
8 64
9 81
10 100
c. 81 , because a number squares is multiplying it by itself. so 9x9 is 81