Answer:
6450 dollars.
Explanation:
c(x) = 0.1x^2 - 34x + 9340 Convert to vertex form.
0.1(x^2 - 340x) + 9340
c(x) = 0.1[ (x - 170)^2 - 28900) + 9340
c(x) = 0.1(x - 170)^2 - 2890 + 9340
c(x) = 0.1(x - 170)^2 + 6450.
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