document.write( "Question 1112535: The percent of light p, as a decimal, that passes through a substance of thickness d, in meters, is given by log (p)=−kd. The value of k for this particular type of opaque glass is 6. How thick should a piece of this glass should be, so that only 20% of the light passes through it?
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Algebra.Com's Answer #727629 by rothauserc(4718) $\"\"$ $\"About$

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log (p) = -kd
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\n" ); document.write( "log (0.20) = -6d
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\n" ); document.write( "d = -log (0.20) / 6 = 0.1165
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\n" ); document.write( "The glass should have a thickness of 0.1165 meters
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