document.write( "Question 700534: i have to maximise the revenue function
\n" ); document.write( "R(x)=385x-0.9x^2 \n" ); document.write( "

Algebra.Com's Answer #431859 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+R%28x%29=385x-0.9x%5E2+\"$
\n" ); document.write( "If the general form is
\n" ); document.write( " $\"+ax%5E2+%2B+bx+%2B+c+\"$ , then then the
\n" ); document.write( "x-coordinate of the vertex is at
\n" ); document.write( " $\"+-b%2F%282a%29+\"$
\n" ); document.write( " $\"+a+=+-.9+\"$
\n" ); document.write( " $\"+b+=+385+\"$
\n" ); document.write( " $\"+c+=+0+\"$
\n" ); document.write( "-----------
\n" ); document.write( " $\"+-b%2F%282a%29+=+-385+%2F+%28+2%2A%28-.9%29+%29+\"$
\n" ); document.write( " $\"+-b%2F%282a%29+=+385%2F1.8+\"$
\n" ); document.write( " $\"+-b%2F%282a%29+=+213.89+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+R%28max%29=385%2A213.89-0.9%2A213.89%5E2+\"$
\n" ); document.write( " $\"+R%28max%29+=+82347.22+-+41174.04+\"$
\n" ); document.write( " $\"+R%28max%29+=+41173.18+\"$
\n" ); document.write( "The maximum revenue is $41,173.18
\n" ); document.write( "Here's the plot:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-100%2C+500%2C+-5000%2C+50000%2C+-.9x%5E2+%2B+385x+%29+\"$ \n" ); document.write( "

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