For #8-10, List all the values of X for which the function is not continuous?

Homework Section 1.6 B. f (x) = x2+4x-5 9. f(x) = *-2x+1 x 2 - x-2 10. f (x) =: x2-25 x4+125x 11. Alicia, the manager of a plant, determines that when x% of her plant's capacity is being used, the total cost of operation is C hundred thousand dollars, where C(x) = 3x2-636x-320 x2-68x-960 a) Find C(0) and C(100) b) Explain why Alicia cannot use the result of part (a) to conclude that the cost of operation is exactly $700,000 where a certain percentage of plant capacity is being used