The cost to produce x units of wire is C=105x +60, while the revenue is R=85x. Find the interval where the product will at least break even.

Answer 1

C= 105x+60 = R = 85x

105x-85x = -60

20x = -60

x =-3 units is the break even point, if that makes any sense

at no positive level of production can you break even

the interval for at least breaking even is (-inf, -3]

maybe there's a typo in the problem