The cost to produce x units of wire is C=205x+800​, while the revenue is R=45x. Find all intervals where the product will at least break even.

Answer 1

to break even cost = revenue

205x+800=45x

160x =-800

x=-800/160=-5

(-infinity, -5) is the inteval where profits are made or the breakeven point x=-5

which doesn't make sense to produce a negative number, unless it's somehow giving refunds to buyers who return the product