What is the worth of an authentic 1833 Mexican Silver Dollar brought home by a soldier during the Civil War?
Not worth much. Face value or depending how much silver and grade of silver it was made of and from. Mexican money is pretty much worthless as is many other countries around the world. Russia, Canada, examples --Monies is worth only face value.
An authentic 1878 trade dollar will be made out of 90% pure silver. However, trade dollars are highly counterfeited, if you have an 1878 trade dollar and wish to sell it, take it to a reputable coin dealer who can make sure it is authentic because even low grade specimens can easily sell for $125 or more.
Unfortunately there's not a specific single identifier for a counterfeit Seated Liberty Dollar a couple of things most people can do is you can weigh the coin it should be 26.73 grams with a diameter of 38.1mm. But this does not guarantee it's authentic. I suggest submitting it to a third-party grading service
How would an increase in the value of the dollar relative to the Mexican peso affect the export of US automobiles to Mexico?
Let's assume the currency exchange of the US dollar to Mexican pesos is valued at 1 dollar = 5 pesos. Then, let's say an American car costs 100 dollars. Now, Mexican buyers will purchase such car in Mexican pesos. So, the cost of the car must be converted to pesos, which according to the currency exchange equals 100 x 5 = 500 Mexican pesos. Now, what happens if the value of the dollar increases to…