How long must the treated version last to be the preferred

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A low-carbon-steel machine part, operating in a corrosive atmosphere lasts 6 yeras, and costs $350. If the part is first treated for corrosion resistance, it will cost $500 part ($150 more than just the part with no treatment) but lasts longer. How long must the treated version last to be the preferred alternative?

Reference no: EM13191070

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