document.write( "Question 499220: In a certain medical test designed to measure carbohydrate tolerance, an adult drinks 3 ounces of a 80% glucose solution. When the test is administered to a child, the glucose concentration must be decreased to 50%. How much 80% glucose solution and how much water should be used to prepare 3 ounces of 50% glucose solution?\r
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Algebra.Com's Answer #337491 by oberobic(2304)\"\" \"About 
You can put this solution on YOUR website!
In solving mixture problems, you have to determine how much \"pure\" stuff you need.
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\n" ); document.write( "For adults and children, you need 3 oz of fluid.
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\n" ); document.write( "The child's the solution must be 50% glucose.
\n" ); document.write( "So, the child's 3 oz will need to have 1.5 oz of \"pure\" glucose and 1.5 oz of other stuff (likely water, but it doesn't matter).
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\n" ); document.write( "You have on hand 80% solution.
\n" ); document.write( "So for each oz you have .8 oz of glucose.
\n" ); document.write( "To get 1.5 oz of pure glucose, you need:
\n" ); document.write( ".8x = 1.5
\n" ); document.write( "8x = 15
\n" ); document.write( "x = 15/8
\n" ); document.write( "x = 1 7/8 oz of the 80% solution
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\n" ); document.write( "You need 3 oz in total, so add 1 1/8 oz of water to 1 7/8 oz of of the 80% glucose solution to produce 3 oz of 50% solution.
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\n" ); document.write( "Done.
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