What type of voting system does the united states use ?

Electoral College

Explanation: During the general election, Americans go to their polling place to cast their vote for president. When tallied the popular vote does not determine the winner. Instead, presidential elections use the Electoral College. To win the election, a candidate must receive a majority of electoral votes.

location is the answer to this

depends on the age of the teen, many believe by the age of 16 a person should know the strong difference between right and wrong along with the difference between risky and immediate death. swimming with sharks might be dangerous but swimming with sharks while bloody meat is attached to you is just insane. even more if you have no idea what you're doing. however, no matter the age, as long as the person is skilled enough and has the mental and physical capacity to control their actions doing whatever sport they put their mind to is all that matters.