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Breathing deeply is up to ________ more times efficient as breathing shallow.
asked
Feb 8, 2018
Biology
high-school
2
answers
5
votes
118k
views
The area of a rectangle is 20 cm² after its dimensions were doubled. What is the area of the original parallelogram?
asked
Apr 7, 2017
Mathematics
high-school
1
answer
3
votes
56.0k
views
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