A machinist is required to manufacture a circular metal disk with area 938 cm2. Give your answers in exact form. Do not write them as decimal approximations. a) What radius, x, produces such a disk?    b) If the machinist is allowed an error tolerance of ±5 cm^2 in the area of the disk, how close to the ideal radius in part (a) must the machinist control the radius?    c) Using the ε/δ definition of a limit, determine each of the following values in this context: f(x)= a= L= ε= δ=

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