That is what the US issues stamps for, so that you can send mail to anyplace in the world.
No, you can only use British stamps for mail posted in London. (You wouldn't expect to be able to use a stamp from a different country on a letter mailed in the USA.)
1 oz letter to UK is .94
yes- the rate is 98 cents for an ordinary letter of no more than one ounce.
how many forever stamps = .94
what the price to mail letter to
5
No, the postman will ignore it. Go get stamps.
maybe 2 0r 3 stamps
Stamps show that you have paid the money to have the letter delivered.
typicaly 2 stamps
No, you must use US postage stamps.
Back of the Book stamps are those that are used for special purposes. These include Air Mail stamps, Special Delivery stamps, tax, official, and postage due stamps. In stamp albums and catalogs they are found at the 'back of the book.'