document.write( "Question 770718: my first question is: \n" );
document.write( "how many ounces of pure silver should be added to 180 ounces, 75% pure, to obtain a mixture of 80% pure?\r \n" );
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document.write( "the second question is: \n" );
document.write( "how many pounds of cream containing 30% butterfat should be added to 500 pounds of milk containing 2% butterfat to give milk containing 3.5% butterfat?\r \n" );
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document.write( "thanks for the answer in advance :) \n" );
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