anwer
yes good economist is always objective.
The answer would actually be a 110 units because the bottom left corner had 20 units and the bigger square had 90.
The zeros of a quadratic function are found where the graph intersects the x-axis. If the graph interects the x-axis in 2 places, we have 2 real solutions; if the graph intersects--or just touches--the x-axis in one place we have one real solution multiplicity 2; if the graph doesn't go through the x-axis at all we have 2 imaginary solutions. Ours goes through the x-axis in 2 places so we have 2 real solutions. Choice A.
3 is not divisible by 48.532. but if it was opposite where 48.532 being divisible by 3 then yes it would be divisible