Let C(x) =x +4x+1 dollars be the cost function, where the x represents the quantity. The !3! estimate cost of the 11th item is: a. 11.6$ O b. 12$ Oc. 12.4$ O d. none If the function is continious at x = c, then the right limit at x=c is equal to f(c). Select one: True False

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