Determine the disintegration rate of the bones during the "dating" which is based on the Carbon 14? State this activity in disintegrations per minute per gram. Some vertebrate bones dug up from an archeological site in Montana were found to be 1.13 x 104 years old. Suppose the half life of C 14 to be 5,730 years and the original activity of15.3 disintegrations per minute per gram.