a thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions.
it is impossible for a map projection to be accurate. the most common one is the mercator projection. Many projections have been tried but all very flawed. the most reliable form of a map is a globe but of course, it's not a projections...so.
It seems you need to move the decimal three times over, then you round the number. So the answer would be 5.5 x 10^3.
