document.write( "Question 1158713: A lab technician needs 35 mL of 15% base solution for a certain experiment, but she has only 10% solution and 20% solution. How many milliliters of the 10% and the 20% solutions should she mix to get what she needs?
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Algebra.Com's Answer #781698 by ikleyn(52810) $\"\"$ $\"About$

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document.write( "Since 15% is exactly half way between the 10% and 20%,\r\n" );
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document.write( "he (or she) needs equal amounts of each original ingredients.\r\n" );
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document.write( "ANSWER.  17.5 mL of each original ingredients.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Any housewife will say it without any calculations.\r
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\n" ); document.write( "\n" ); document.write( "(Because she has common sense . . . )\r
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