document.write( "Question 876989: Please help me solve this problem:
\n" ); document.write( "A glass 1 cm thick allows only 80% of the light to filter through. How much light will filter through a glass 2 cm thick?
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Algebra.Com's Answer #529090 by jim_thompson5910(35256)\"\" \"About 
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80% of 80% = 0.8*0.8 = 0.64 = 64%\r
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\n" ); document.write( "\n" ); document.write( "So a 2 cm thick glass will let in 64% of the light.
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