document.write( "Question 944544: ``A nurse is told to give a patient recovering from surgery a total of 21 units of a potent antibiotics over 3 days. The dosage should be cut in half the second day, then in half again for the third day. How many units should she administer on the first day??\r
\n" ); document.write( "\n" ); document.write( "Pleae help. I know it's easy but I can't seem to grasp it.
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Algebra.Com's Answer #575917 by macston(5194)\"\" \"About 
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Let D=dosage third day, 2D is dosage second day and 4D is dosage first day
\n" ); document.write( "4D+2D+D=21 units: Total for three days is 21 units
\n" ); document.write( "7D=21 units
\n" ); document.write( "D=3 units: She would administer 3 units on Day 3
\n" ); document.write( "2D=6 units She would administer 6 units on Day 2
\n" ); document.write( "4D=12 units She would administer 12 units on Day 1 ANSWER
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