Laughed... laughed would be the action being done in this sentence
The answer is $800 because (8000*10/100=$800)
Does it have to be over a certain topic?
C) We went to hear the man himself speak.
Himself is an intensive pronoun. Intensive and reflexive pronouns end use the object form of the pronoun and end in -self. Intensive pronouns are found immediately after the antecedent. In this case, after "man" because "himself" is intensifying "man".