Question 1073105
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The revenue function for this problem was just constructed in

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It is a composite function


<pre>
         x*30                if x <= 50, 
R(x) =                                   and
         x(30-0.5*(x-50))    if x > 50.
</pre>


No one of the options 1) - 4) is composite function, so the answer is the option 5).
</pre>