in 2010 a person needs 1 british pound to purchase $1.15 us dollar. in 2020, a person needed 1 british pound to purchase 1.25 us dollar. did the us dollar appreciate or depreciate? 1. if a british tourist travelled to america, would that tourist have benefited from the change in the exchange rate? explain. 2. as a result if the above, should american exports have increased or decreased? explain