approximately, 12.
President nixon
10
All of them actaully.
6
some
No Marco Polo did not find China. He visited China with his dad and his Uncle and he found many great treasures. He just visited there.
The 9 presidents are: Douglas Hyde Sean T. O'Kelly Eamon De Valera Erskine Childers Cearbhall O Dalaigh Patrick Hillery Mary Robinson Mary McAleese Michael D. Higgins became the 9th president on the 11th of November 2011.
1
All of the US presidents have been men. There have been no female presidents.
Three presidents of the US have visited Ghana up till this year 2010 and they are;1.Bill Clinton 2.George Walker Bush and 3.Barack Hussan Obama.
none
Marco Polo visited China and found inventions such as paper and pasta.
One