document.write( "Question 1142704: The amount of medicine in micrograms, A, in a person's bloodstream t minutes after a certain quantity of it has been inhaled can be approximated by the equation Upper A= -38tsquared +152t. How long after inhalation will there be about 114 micrograms of medicine in the bloodstream? \n" ); document.write( "

Algebra.Com's Answer #763435 by ikleyn(52781) $\"\"$ $\"About$

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document.write( " = 114.\r\n" );
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document.write( " = 0.\r\n" );
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document.write( "Simplify\r\n" );
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document.write( " = 0.\r\n" );
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document.write( "Factor left side\r\n" );
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document.write( "(t-3)*(t-1) = 0.\r\n" );
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document.write( "There are two solutions:  t= 1 minute  and  t= 3 minutes.\r\n" );
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