Answer:
When rocks deform by plastic deformation they can bend and fold. The process of folding occurs when rock is compressed, as it is along colliding plate boundaries. Upturned folds are called anticlines and down turned folds are called synclines.
Make the united kingdoms flag that should work
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.
We learn about this in my class A.