Answers by Bill Posters
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Answers by Bill Posters

Answers by Bill Posters
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A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 50 cm/s. Find the rate at which the area within the circle is increasing after 3 seconds
answered Apr 29, 2017
4 votes
14.9k views
Who developed the ideas that contradicted Ptolemy's geocentric model of the universe?
answered Aug 31, 2016
5 votes
84.6k views
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