document.write( "Question 1039269: When a certain drug is taken orally, the concentration of the drug in the patient's bloodstream after t minutes is given by \r
\n" ); document.write( "\n" ); document.write( "C(t) = 0.08t − 0.0004t^2, where 0 ≤ t ≤ 240 and the concentration is measured in mg/L.\r
\n" ); document.write( "\n" ); document.write( "When is the maximum serum concentration reached?
\n" ); document.write( "t = ______min.\r
\n" ); document.write( "\n" ); document.write( "What is the maximum concentration?
\n" ); document.write( "________mg/L. \n" ); document.write( "
Algebra.Com's Answer #654025 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "If you have a 2nd-degree polynomial function of the form , and the lead coefficient is negative, then the graph is parabola that opens downward. The vertex of the parabola represents the maximum of the function. The -coordinate of the vertex is given by and the -coordinate of the vertex, which is the maximum value of the function, is given by .\r
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\n" ); document.write( "\n" ); document.write( "For your function, is the independent variable, is the dependent variable (the value of the function), 0.08 is the \"b\" value, and 0.0004 is the \"a\" value.\r
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\n" ); document.write( "\n" ); document.write( "Just do the arithmetic.
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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