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Find the minimum value of the average cost for the given cost function on the given intervals. C(x) =x +29x + 128 a. 1sxs 10 b. 10 5 x $ 20For a certain mammal, researchers have determined that the mesiodistal crown length of deciduous mandibular first molars is related to the post conception age of the tooth as L(t) = - .015t~ + 1.33t -7.6, where L(t) is the crown length (in millimeters) of the molar t weeks after conception. Find the maximum length in mesiodistal crown of mandibular first molars during weeks 30 through 60. The maximum length is |mm. (Round to three decimal places as needed.)