An aircraft facotry manufactures ariplane engines.  The unit cost C (the cost in dollars to make each airplane engine) depends on the number of engines made.  If x engines are made, then the unit cost is given by the function  C(x)=0.8x2-352x47,684.  What is the minimum unit cost?

College Algebra (MindTap Course List)
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Chapter4: Polynomial And Rational Functions
Section4.1: Quadratic Functions
Problem 77E: Minimizing cost A company that produces and sells digital cameras has determined that the total...
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An aircraft facotry manufactures ariplane engines.  The unit cost C (the cost in dollars to make each airplane engine) depends on the number of engines made.  If x engines are made, then the unit cost is given by the function  C(x)=0.8x2-352x47,684.  What is the minimum unit cost?

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Step 1

C(x)=0.8x2-352x+47,684 is an equation of a parabola with a positive leading coefficient. 

So it will open upwards and it will have a minimum at the vertex. 

 

 

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