How is the economy of northern europe different from that of the united states?

This may not be your answer nor helpful, but Europe has more reliable Market Economy because its not all profit, they don't sell Cheap or low quality goods to the community Example We have a Microwave from Europe that my family Bought in 1997, now normally American Microwaves last only when the warranty expires or less.  Our microwave is still running after 21 years. Now thats worth your money.  (Forgot to add but living in Europe is better than America, tho don't take that as advice.)  

H=   2(area/a+b)h= 2(144/a+b)h= 2(144/18+18)h= 2(144/36)h= 2(4)h=8