document.write( "Question 366578: We want to set up a business so that the minimum cost occurs when we make 13,000 items per hour at a cost of $21 per item. We also know that if we make 9,000 items per hour the cost per item is $24.
\n" ); document.write( "Create a quadratic equation that represents the situation. Give you final answer in the form y=ax^2+bx+c \r
\n" ); document.write( "\n" ); document.write( "I cannot figure out how to write anything in this form. I don't understand which each letter stands for. \n" ); document.write( "

Algebra.Com's Answer #261239 by jim_thompson5910(35256) $\"\"$ $\"About$

You can put this solution on YOUR website!
Hint: The quadratic in the form $\"y=a%28x-h%29%5E2%2Bk\"$ gives you the vertex (h,k). At this vertex is the highest/lowest point. Since we want to minimize costs, this means that (h,k) is the lower point. Also, this means that $\"a%3C0\"$ (ie 'a' is negative). Let me know if this is enough to get started. \n" ); document.write( "

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