An isotope used for absolute dating has a half-life of 100,000 years. Laboratory analysis of a crystal, which originally formed with only the parent isotope present, is now found to have a parent-to-daughter ratio of 1 :3. How long has it been since the crystal formed? * A. 33,000 years
B. 50,000 years
C. 200,000 years
D. 300,000 years

weathering is the answer.

most community's take hundreds of years to become stable

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

i believe the answer would be b. hope it : )