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March 27, 2015

March 27, 2015

Posted by **Anonymous** on Saturday, February 25, 2012 at 6:00pm.

- 7th Grade Math -
**Anonymous**, Sunday, March 4, 2012 at 2:51pmTwo rectangles are similar the ratio of the lengths of their corresponding sides is 1:2 find the ratio of peremiters of the rectangles then find the ratio of areas

- 7th Grade Math -
**a**, Tuesday, March 6, 2012 at 7:51pmIt's really straight forward. You measure the radius (distance from the center of the CD to the outside) and the height (measure the thickness of the CD) then you find the area of the CD's surface by multiplying the radius by itself then multiplying your answer times 3.14 or pi (a= (pi)r^2) then when you've found that you multiply it by the height of the CD and you've found the volume. To find how many minutes of music there are you simply find the length of all the music on the CD and you divide that by the volume of the CD.

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