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Answers by Tig

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A sample of 12 measurements has a mean of 8.5 and a sample of 20 measurements has a mean of 7.5. Find the mean of all 32 measurements.
answered Jun 16, 2018
1 vote
79.5k views
How many terms are in this expansion (2x 10y)^15
answered Jan 22, 2018
7 votes
203k views
What type of government is practiced in Botswana?
answered Oct 26, 2017
5 votes
5.6k views
At noon, a tank contained 10 cm of water. after several hours, it contained 7 cm of water. what is the percent decrease of water in the tank?
answered Oct 16, 2017
2 votes
1.3k views
Ninety-five percent of all living organisms were killed by the deadliest mass extinction in history. It is known as the _____ mass extinction. a.Cretaceous-Tertiary b.End Triassic c.Permian-Triassic d.
answered Aug 21, 2017
0 votes
100k views
How do plants cells use oxygen
answered May 9, 2017
4 votes
16.6k views
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