A half-life is:
A. the remains of ancient living things
B. the time needed for half of a radioactive material to decay.
C. removing items from the ground by digging.
D. a gap in the rock record that indicated a time where no deposition has occurred, or where erosion has taken place.

Question

A half-life is:
A.	the remains of ancient living things
B.	the time needed for half of a radioactive material to decay.
C.	removing items from the ground by digging.
D.	a gap in the rock record that indicated a time where no deposition has occurred, or where erosion has taken place.

anonymous · Answer

sorry did mean to put this in mathmatics