A store estimates that its cost when selling x lamps per day is C dollars, where C
Question:
A store estimates that its cost when selling x lamps per day is C dollars, where C = 40x + 30 (the marginal cost per lamp is $40). If daily sales are rising at the rate of three lamps per day, how fast are the costs rising? Explain your answer using the chain rule.
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Usman Nasir
I did Master of Commerce in year 2009 and completed ACCA (Association of Chartered Certified Accountants) in year 2013. I have 10 years of practical experience inclusive of teaching and industry. Currently i am working in a multinational company as finance manager and serving as part time teacher in a university. I have been doing tutoring via many sites. I am very strong at solving numerical / theoretical scenario-based questions.
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Related Book For 
Calculus And Its Applications
ISBN: 9780134437774
14th Edition
Authors: Larry Goldstein, David Lay, David Schneider, Nakhle Asmar
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