4.5 - Blackboard Learning System 9:48 PM Your location...

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Unformatted text preview: Blackboard Learning System 3/29/09 9:48 PM Your location: Assessments › View All Submissions › View Attempt View Attempt 2 of 5 Title: Started: Submitted: Time spent: Problem Set 4.5 March 22, 2009 1:35 AM March 22, 2009 2:36 AM 01:01:15 Total score adjusted by 0.0 Maximum possible score: 10 Total score: 9/10 = 90% Done 1. Provide an appropriate response. An equation that defines y as a function of x is given. Solve for y in terms of x, and replace y with the function notation f(x). 9x2 + 7y = 6 Student Response A. B. C. f(x) = - 9x2 + f(x) = f(x) = Feedback D. f(x) = 6 - 9x2 Score: 2. Provide an appropriate response. An equation that defines y as a function of x is given. Solve for y in terms of x, and replace y with the function notation f(x). 5x - 6y = 5 1/1 Student Response Feedback http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct Page 1 of 5 Blackboard Learning System 3/29/09 9:48 PM A. B. f(x) = f(x) = 5 x C. f(x) = 5 - 5x D. Score: 3. Solve the problem. The demand equation for a certain product is 4p 2 + q 2 = 1300, where p is the price per unit in dollars and q is the number of units demanded. Find dq/dp. Student Response A. dq/dp = -4q/p B. dq/dp = -4p/q C. dq/dp = -q/4p D. dq/dp = -p/4q Score: 4. Provide an appropriate response. Find dy/dx by implicit differentiation. x3 + y3 = 5 1/1 Feedback f(x) = -5x 1/1 Student Response A. =- Feedback B. =- C. = http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct Page 2 of 5 Blackboard Learning System 3/29/09 9:48 PM D. = 1/1 Score: 5. Provide an appropriate response. Find dy/dx by implicit differentiation. x3 + 3x2y + y3 = 8 Student Response A. = Feedback B. =- C. =- D. = 1/1 Score: 6. Provide an appropriate response. Find dy/dx by implicit differentiation. 2xy - y2 = 1 Student Response A. B. C. = = = Feedback http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct Page 3 of 5 Blackboard Learning System 3/29/09 9:48 PM D. Score: 7. = 1/1 Differentiate implicitly to find the slope of the curve at the given point. xy 2 = 12; (3, -2) Student Response A. 3 B. C. -3 D. Score: 8. 0/1 Feedback For the given demand equation, differentiate implicitly to find dp/dx. (p + 9)(x + 8) = 28 Student Response A. B. C. D. Score: 9. Find dy/dx by implicit differentiation. http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct Feedback ====1/1 Page 4 of 5 Blackboard Learning System 3/29/09 9:48 PM xy + x + y = x2y2 Student Response A. Feedback B. C. D. Score: 10. 1/1 Find dy/dx by implicit differentiation. xy + x + y = x2y2 Student Response A. Feedback B. C. D. Score: 1/1 Done http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct Page 5 of 5 ...
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