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The ratio of uranium-238 to lead-206 in a rock sample can be used to determine the samples A. Absolute Age B. Relative Age C. Radioactivity D. Mass
asked
Aug 15, 2018
Biology
high-school
1
answer
1
vote
42.6k
views
The formula for the nth term of an arithmetic sequence can be found using the formula a(n)= a1+(n-1)^d. Which of the following is equivalent to this equation?
asked
Feb 27, 2018
Mathematics
high-school
2
answers
4
votes
44.8k
views
What was one of the main reasons the portuguese and spanish failed at enslaving native people of the new world
asked
Apr 16, 2017
History
high-school
2
answers
4
votes
146k
views
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