That would depend on where the Peso was from.
Puerto Rico is part of the US, so the US dollar is used there. There is no separate, specifically Puerto Rican, money.
around 1 1/2 hours
1 hour and 26 minutes.
Puerto Rico is not a US district, Puerto Rico is a commonwealth of the U.S.A., but Puerto Rico is self governing, Puerto Rico has its own laws, senators, and leaders that are elected by the Puerto Rican people. Puerto Rico can make its own laws without approval of the US government. Puerto Rico also speaks Spanish, only 1 out of 10 people on the island speak somewhat English, that means only 15% of the people there are fluent in English.
Puerto Rico's role in World War 1 was non combative. In most cases, the Puerto Ricans would serve as doctors in American armies.
Pastport - 2010 Puerto Rico 1-4 was released on: USA: 18 September 2011
Nitro Circus - 2009 Puerto Rico 1-10 is rated/received certificates of: USA:TV-14
Nitro Circus - 2009 Puerto Rico 1-10 was released on: USA: 12 April 2009
On the Up - 2007 Miss Puerto Rico 1-122 was released on: USA: 4 December 2007
Have Fork Will Travel - 2007 Puerto Rico 1-4 was released on: USA: 18 September 2007
Taste of the Caribbean Puerto Rico - 2010 TV was released on: USA: 1 October 2010
Puerto Rico is has been part of the United States since 1898. The United States entered World War 1 in 1917. So, yes. Puerto Ricans fought proudly in WW1.