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Table 4 Transportation cost from the incinerator to the landfill (in dollars)

From: Using concave optimization methods for inexact quadratic programming problems with an application to waste management

  Time span (k = 1) Time span (k = 2) Time span (k = 3)
\(FT_{k}^{\pm }\) [−0.0065X + 5.70, [−0.0070X + 6.27, [−0.0076X + 6.90,
  −0.0047X + 7.65] −0.0055X + 8.38] −0.0058X + 9.25]
\