Respuesta :

The square root of 400 is 20. It's a real number, 20 x 20 = 400

√400 = 20

I hope this helps!

Answer:

Step-by-step explanation:

20*20 is =400  

so i believe it is a real number and a whole number

*if you looking to classify it i believe it would be a real, whole,rational, and a integer

hope that helped     good luck!