document.write( "Question 91186: They have found that the ocean filters 18% of the sunlight for each 4 feet they descend. HOw much sunlight is filtered at a depth of 20 feet? The divers need to use spotlights when the amount of sunlight is less than 10% will they nee spotlights at 48 feet? \n" ); document.write( "

Algebra.Com's Answer #66201 by checkley71(8403) $\"\"$ $\"About$

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4/.18=20/X
\n" ); document.write( "4X=20*.18
\n" ); document.write( "4X=3.6
\n" ); document.write( "X=3.6/4
\n" ); document.write( "X=.9 OR 90% FILTERING OF SUNLIGHT @ 20 FEET.THEY'LL NEED LIGHTS BELOW 20 FEET THUS THEY'LL NEED THEM ALSO @ 48 FEET
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