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# 3.7 - Blackboard Learning System 4:44 PM Your location...

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4/14/09 4:44 PM Blackboard Learning System Page 1 of 4 http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct View Attempt 2 of 5 Title: Problem Set 3.7 Started: February 15, 2009 10:21 PM Submitted: February 15, 2009 10:31 PM Time spent: 00:09:24 Total score: 10/10 = 100% Total score adjusted by 0.0 Maximum possible score: 10 Done 1. Provide an appropriate response. Let C(x) be the cost function and R(x) the revenue function. Compute the marginal cost, marginal revenue, and the marginal profit functions. C(x) = 0.0005x 3 - 0.06x 2 + 200x + 50,000 R(x) = 400x Student Response Feedback A. C'(x) = 0.0015x 2 + 0.12x + 200 R'(x) = 400 P'(x) = 0.0015x 2 + 0.12x + 200 B. C'(x) = 0.0015x 2 - 0.12x + 200 R'(x) = 400 P'(x) = 0.0015x 2 - 0.12x - 200 C. C'(x) = 0.0015x 2 - 0.12x + 200 R'(x) = 400 P'(x) = -0.0015x 2 + 0.12x + 200 Score: 1/1 2. Provide an appropriate response. The revenue (in thousands of dollars) from producing x units of an item is modeled by Find the marginal revenue at x = 1000. Student Response Feedback A. \$104.00 B. \$4.50 Your location: Assessments View All Submissions › View Attempt

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4/14/09 4:44 PM Blackboard Learning System Page 2 of 4 http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct
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