400 is a significant number because it is a square number as 20*20 = 400
20*20 = 400
Yes, 202 = 400
A square number is an integer which is the square of some smaller integer. For example, 144 is square because 144 = 12*12 = 12^2 400 is a square number because 400 = 20^2. Anything bigger than 20, when multiplied by itself, will make a square greater than 400. How about 21?
20
One acre has 43,560 square feet. Divide the number of square feet by that and you get the number of acres. This gives you an answer of 3.67 acres.
20 squared is 400.
400 square feet. This is an easy calculation - just multiply the length in feet by the width in feet. The answer is the number of square feet.
Answer: Umm... i dont know... Well 500 is soo is 400??? OMg -_-""""" From Unknown
Well, a square number is the answer to a number multiplied by itself. So, what you'd have to do is multiply 20*20, and the answer is 400.
It is a square number because 20 times 20 = 400
400 square feet = 400 x 144 = 57600 square inches Number of 60 x 60 square inch in 57600 is 57600/3600 = 576/36 = 16