11ac1064_ions___Astronomy___Black_Holes__Question
[Date Answered] December 10, 2007 [Questioner (age, location)] shania (TX) [Answer] I don't think there is a unique theoretical answer to this question, but what seems to be generally accepted by physicists is that if an event occurs close enough to a black hole where antimatter is thrown in but the matter escapes from the black hole (this is known as Hawking Radiation), and this happens enough, the black hole will begin to "evaporate". [Question] 
on average about how long do black holes last????
Quickie Questions - Astronomy - Black Holes