document.write( "Question 1194085: A firm estimates that it can sell Q units of its product with an advertising expenditure of x thousand dollars where \r
\n" ); document.write( "\n" ); document.write( "Q = Q(x) = - x ^ 2 + 600x + 25\r
\n" ); document.write( "\n" ); document.write( "i) Over what level of advertising expenditure is the number of units of product sold increasing?\r
\n" ); document.write( "\n" ); document.write( " ii) Over what level of advertising expenditure is the number of units of product sold decreasing? \n" ); document.write( "

Algebra.Com's Answer #826183 by Boreal(15235) $\"\"$ $\"About$

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The vertex is where x=-b/2a=-600/-2 or 300
\n" ); document.write( "It is increasing from (0, 300) and decreasing from (300, oo), units are thousands of dollars.
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