Which department store created rudolph the red-nosed reindeer?

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Arival company manufactures fuel tanks for cars using a different production technique. the total weekly cost (in dollars) of producing x tanks is given by c(x) = 10000 +90x - 0.04x2 find the marginal cost at a production level of 500 fuel tanks per week to approximate the cost of the 501st unit (round to the nearest 2 decimal places, if needed)

Which critical success factor improves with reduced cycle time, better quality standards, and improved efficiency when an is is implemented?