Ask at a post office in USA !
For a regular letter? Just one.
Just 1. Hawaii is zone 8.
letter p
To reach the letter in proper place
It takes 42 postage stamps
No, you must use US postage stamps.
The value is different for each country and type of postage; ask in your country at a post office.
The first postage stamps were issued in 1840 in Great Britain. Before that time. postage was either collected upon delivery or prepaid with cash when the letter was mailed.
Yes as long as the other stamps have not been cancelled
The number of stamps must equal the amount of postage. The postage depends on the weight and and form of transport.
2
Benjamin Franklin and George Washington were on the first US Postage stamps.