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The radioactive isotope carbon-11 is used in medicine for brain-scan procedures. It decays losing half its mass every 20 minutes. If a doctor checks on a patient two hours after the isotope has been administered
answered Aug 7, 2019
5 votes
217k views
PLEASE SOMRONR HELP ME WITH THIS ONE I REALLY WANNS LEARN SO BAD BUT I'm confused
answered Jul 31, 2019
4 votes
149k views
Which of the following best describes the purpose of the Monroe Doctrine
answered Mar 4, 2019
0 votes
78.7k views
To find the average grades scored by students in science and math, the principal of a school sends a questionnaire to the top five students in each grade of the high school. Is the sample used by the principal
answered Mar 21, 2018
4 votes
217k views
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