document.write( "Question 377617: the cost of building x picnic tables is given by the formula, C(x)= x^2-12x+72. how many picnic tables should mr. denison build to have a minimum cost? what is that minimum cost? \n" ); document.write( "
Algebra.Com's Answer #268295 by edjones(8007)\"\" \"About 
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x(at minimum)=-b/2a
\n" ); document.write( "=12/2=6 the number of tables to build for a minimum cost.
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\n" ); document.write( "x^2-12x+72
\n" ); document.write( "=6^2-12*6+72
\n" ); document.write( "=36-72+72
\n" ); document.write( "=36 minimum cost
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