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April 19, 2014

April 19, 2014

Posted by **Melea** on Saturday, August 21, 2010 at 9:46am.

- 7th grade math -
**drwls**, Saturday, August 21, 2010 at 10:19amThe speed of light in optical fiber is actually closer to 120,000 miles per second. It travels more slowly in glass than in air or vacuum.

The first sentence in your question is in error. The method of solution remains the same as jai's answer.

- 7th grade math -
**khachik**, Wednesday, September 1, 2010 at 10:41pm30-nfor n =8

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