document.write( "Question 321655: the concentration in part per million, of a particular drug in a patient blood x hours after the drug is administered is given by the fucntion f(x)= -x^4+11x^3-24x^2+54x. how many hours will it take the drug to be eliminated from the blood stream \n" ); document.write( "

Algebra.Com's Answer #230331 by stanbon(75887) $\"\"$ $\"About$

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f(x)= -x^4+11x^3-24x^2+54x. how many hours will it take the drug to be eliminated from the blood stream
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\n" ); document.write( "Solve -x^4+11x^3-24x^2+54x = 0 for \"x\":
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\n" ); document.write( "Factor out \"-x\" to get:
\n" ); document.write( "-x(x^3 - 11x^2 + 24x - 54) = 0
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\n" ); document.write( "Solve x^3-11x^2 + 24x -54 = 0
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\n" ); document.write( "I graphed it and found a zero at x = 9
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\n" ); document.write( "9)....1....-11....24....-54
\n" ); document.write( ".......1......-2....6....|..0\r
\n" ); document.write( "\n" ); document.write( "Quotient: x^2-2x+6 has complex zeroes.
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\n" ); document.write( "x = 9 is the only decent answer.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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