document.write( "Question 849548: A tank with a radius of 6 feet contains 1 foot of 5% acid solution. In order to mix an 8% solution, a 20% solution is added. How much 20% solution will be added? (Find ft3, gallons, and level change in tank). Please Help me find an easy way to understand how to do these... \n" ); document.write( "
Algebra.Com's Answer #511648 by josgarithmetic(39663)\"\" \"About 
You can put this solution on YOUR website!
1 cubic foot = \"%28576%2F77%29\" U.S. Gallons;------------ http://en.wikipedia.org/wiki/Cubic_feet\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Volume of 5% acid in the tank: \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Want to add some v gallons of 20% acid to that to make 8% acid result.
\n" ); document.write( "\"%28846%2A5%2B20%2Av%29%2F%28v%2B846%29=8\"
\n" ); document.write( "\"20v%2B846%2A5=8%28v%2B846%29\"
\n" ); document.write( "\"20v%2B846%2A5=8v%2B8%2A846\"
\n" ); document.write( "\"%2820-8%29v=%288-5%29846\"
\n" ); document.write( "\"12v=3%2A846\"
\n" ); document.write( "\"v=3%2A846%2F12\"
\n" ); document.write( "\"highlight%28v=211.5%29\" gallons of the 20% acid.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "You can convert that volume into cubic feet, and use \"highlight_green%28y%2Api%2A6%5E2=211.5%2877%2F576%29%29\" and solve for y, here being the vertical increment of change for the 211.5 gallon addition of the added acid.
\n" ); document.write( "
\n" );