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.

...

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