Question

7.
The area of a square plot is 800 m2. Find the estimated length of the side of the
plot. Plz send me photo it's urgent​

Answer 1

So now we know the digital root of 400 is 4. Is 4 in the list of digital roots that are always a square root (1, 4, 7 or 9)? Answer: YES, 4 is in the list of digital roots that are always perfect squares. We can conclude that 400 could be a perfect square!

Answer 2

Answer:

So now we know the digital root of 400 is 4. Is 4 in the list of digital roots that are always a square root (1, 4, 7 or 9)? Answer: YES, 4 is in the list of digital roots that are always perfect squares. We can conclude that 400 could be a perfect square!