Answers by Karan Verma
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Answers by Karan Verma

Answers by Karan Verma
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An original sample of the radioisotope fluorine-21 had a mass of 80.0 milligrams. Only 20.0 milligrams of this original sample remain unchanged after 8.32 seconds. What is the half-life of fluorine-21?
answered Apr 28, 2017
4 votes
2.9k views
The winner of the cross-country meet ran 6 miles in 2 hour. What is the average speed per minute?
answered Apr 14, 2017
3 votes
210k views
Suppose a parabola has an axis of symmetry at x = –7, a maximum height of 4, and also passes through the point (–6, 0). Write the equation of the parabola in vertex form.
answered Feb 28, 2017
3 votes
77.9k views
Which of the following is equal to (2x/5-9)+9 A. 2x/5 B. 5x/2 C. 2x-45/5 D. (2x-9)+45
answered Jan 23, 2017
2 votes
83.0k views
Which of the following nations used social media sites to organize protests? Algeria Morocco Egypt Chile
answered Oct 10, 2016
7 votes
97.3k views
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