What percentage of the rock will be Ar-40 when the rock is 2.6 billion years old?

answer: musical connotation

leonard b. meyer (1918-2007) was an american composer, author and philosopher. his work emotion and meaning in music is perhaps the first major treatise on music. it is a philosophical and psychological work, greatly influenced by koffka (one of the major proponents of gestalt psychology). his work deals with the problem of musical meaning and musical communication.

your answer is "graduates" hope this

earthquake fault lines

where is the passage