document.write( "Question 894923: A garment manufacturer's total revenue function is given by the equation R(y)=-3y^2+522y-320 where \"y\" is the number of units. Find the marginal revenue, /MR, for garments at y=21\r
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Algebra.Com's Answer #542433 by MathTherapy(10555) $\"\"$ $\"About$

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A garment manufacturer's total revenue function is given by the equation R(y)=-3y^2+522y-320 where \"y\" is the number of units. Find the marginal revenue, /MR, for garments at y=21\r
\n" ); document.write( "\n" ); document.write( "This is the only thing left in my chapter that is confusing me. Can someone please help. Thank you.
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document.write( "To calculate marginal revenue, find the derivative of the revenue function, and then substitute number of units
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document.write( "into the derivative function.
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document.write( "Therefore,  becomes: , which becomes:  ----- Substituting 21 for y
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document.write( ", or .
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document.write( "You can do the check!! \r
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