Answer:
4 What economy bases economic decisions on customs and beliefs?
are real world examples
Concentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus. Any two circles can be made concentric by inversion by picking the inversion center as one of the limiting points.
I believe that it is true, however it could be the fact they are in a perma frost region i suppose, but faulty construction seems more likely.
