(2) U-238 is the radioisotope used in dating geological formations. Uranium-238 has a half-life of 4.46 billion years, which makes it suitable to date such old formations.
The other options do not have such long durabilities and half-lives.
Jsjsjskskskskskssjdjssjsksksskskkskskssiosis
Answer:
billion is larger \ part if billion
Slavery played a big role in this. the confederacy allowed slavery while the union was oppose to it.
This is called the pedigree chart.
