5. A company manufactures paper shredders. The total weekly cost (in dollars) of producing x shredders is given by: (5 points). C(x)=14,500+35x-0.02x^2 a) Find the marginal cost function. b) Find the marginal cost at a production level of 400 shredders per week. c) Interpret the value found in b). d) Find the exact costs of producing the 401st item

Six years ago, an 80-kw diesel electric set cost $160,000. the cost index for this class of equipment six years ago was 187 and is now 194. the cost-capacity factor is 0.6. the plant engineering staff is considering a 120-kw unit of the same general design to power a small isolated plant. assume we want to add a precompressor, which (when isolated and estimated separately) currently costs $13291. determine the total cost of the 120-kw unit. (hint: skip $ and comma symbols)