Answer:
Many Native American tribes suffered high mortality and depopulation, averaging 25–50% of the tribes' members lost to disease.
Explanation:

Type that in your calculator to get 268, hope that helped
Answer:
A study was published last week on the DNA of Helicobacter pylori, the pathogen extracted from the stomach of Ötzi, the ice mummy
Explanation:
New research at the European Academy of Bolzano/Bozen further clarifies the genetic history of man who lived in the Eastern Alps over 5,300 years ago.
maybe this'll help