What was one reason that native americans began to negotiate with us government about treaties that eventually led to the trail of tears

They realized the superiority that the US government had and eventually began to realize that the implementation of a treaty would help protect their land subsidies and thereby sustain their primitive (at least to the US) way of life

Iprobably use google

Currently, as of february 2016, an american traveling in france would be by the exchange rate. the weakness of the euro and the strength of the us dollar means that items in france cost less to an american than they otherwise would. of course, if this trend reverses and the us dollar weakens and the euro strengthens, such as was happening in early 2008, an american traveling in france would have an adverse experience because items would cost relatively more.