SOLUTION: In a certain medical test designed to measure carbohydrate tolerance, an adult drinks 9 ounces of a 50% glucose solution. When the test is administered to a child, the glucose conc

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Question 647416: In a certain medical test designed to measure carbohydrate tolerance, an adult drinks 9 ounces of a 50% glucose solution. When the test is administered to a child, the glucose concentration must be decreased to 20%. How much 50% glucose solution and how much water should be used to prepare 9 ounces of 20% glucose solution?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
water = water, Let x = amount of water to be added
+.50%289-x%29+%2B+x+=+.80%2A9
.5x+=+.30%2A9
x+=+.30%2A9%2F.5
x = 5.4oz of water and 3.6 oz of the 50%solution of glucose
and...
.50%2A3.6+%2B+5.4+=+1.8+%2B+5.4+=++.80%2A9+=+7.2