You may as long as the size and weight meets the standard for First Class Mail.
Yes, since Puerto Rico is PART of the US. It is a Commonwealth, and part of the US Postal System.
Yes. Puerto Rico is as much a part of the United States as is the District of Columbia (Washington DC). The United States Postal Service handles the mail there.
The same as any US stamp.
Puerto Rico does not have states. There are "municipalities" in Puerto Rico. Rincon and Rio Grande are the Puerto Rico municipalities that begin with the letter R.
Exactly like any other US Stamp.
Puerto Rico Soccer League Regular Season Cup was created in 2008.
Mayaguez is the 8th largest municipality in Puerto Rico.
A single first class stamp will do the trick (for letters weighing less than an ounce). It's no different than mailing a letter from Miami to Newark because Puerto Rico is a territory of the United States.
Soy de Puerto Rico. (I'm from Puerto Rico) or Soy puertorriqueño. (I'm a Puerto Rican)
No, Puerto Rico is an island.Actually Puerto Rico is NOT a continent ; it is an island .
Puerto Rico
if arriving from coutries outside of the US, yes, if you arrive from any of the states no
Puerto Rico
Puerto rico will never be a state