Please see the pic. I'd solved in it and I'm so sorry for cuttings.
The answer is 6 when u are working with a negative a positive number subtracts
This problem can
be directly solved by ratio and proportion.
We know that there
are 646,449 people for every 68.3 square miles, so:
646,449 people : 68.3
square miles = X : 570,374 square miles
We know that the :
symbol signifies division therefore,
646,449 / 68.3 = X
/ 570,374
X = 5,398,502,224
people
A congruent number is a positive integer that is the area of a right triangle with three rational number sides.