Posted by **Anonymous** on Thursday, January 17, 2013 at 11:19pm.

The weekly cost of manufacturing x telephones per week is found by a manufacturer to be C(x)= 500+20x+xsq dollars.

The telephones can be sold at a price p=$80 each.

a)find the manufacturers's break-even production level(s)

b)for what production levels will the manufacturer experience a profit?

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