4x 12x 3 d 4 4x2 score 14 44 feedback

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Unformatted text preview: . 4/4 Feedback http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct Page 6 of 12 Blackboard Learning System 4/14/09 4:45 PM Use the definition f'(x) = f(x) = 8 - 8x2 to find the derivative at x. Student Response A. -16x B. 8 - 16x C. -16x 2 D. 8 - 8x Score: 15. Provide an appropriate response. Find f'(x) if f(x) = 6x-2 + 8x3 + 11x. Student Response A. f(x) = -12x -1 + 24x 2 B. f'(x) = -12x -1 + 24x 2 + 11 C. f'(x) = -12x -3 + 24x 2 D. f'(x) = -12x -3 + 24x 2 + 11 Score: 16. Provide an appropriate response. Find: if 4/4 4/4 Feedback Feedback Student Response A. - Feedback B. -12t-5 + 5t -2 C. -12t-5 - 5t -2 http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct Page 7 of 12 Blackboard Learning System 4/14/09 4:45 PM D. -12 t 5 - 5t 2 Score: 17. Find dy. y=x 4/4 Student Response A. B. C. D. dx dx dx dx 4/4 Feedback Score: 18. Find dy. y = 9x2 - 8x - 7 Student Response A. (18x - 8) dx B. 18x dx C. 18x - 7 dx D. 18x - 16 dx Score: 19. 4/4 Feedback Use differentials to calculate the given number. Give your answer as a decimal. Round to 5 decimal places if necessary. http://online.sdccd.edu/webct/urw/lc4130001.tp0/cobaltMainFrame.dowebct Page 8 of 12 Blackboard Learning System 4/14/09 4:45 PM Student Response A. 5.00000 B. 3.50000 C. 4.50000 D. 4.03125 Score: 20. Provide an appropriate response. 4/4 Feedback Suppose the demand for a certain item is given by D(p) = -3p 2 + 4p + 5, where p represents the price of the item. Find D'(p), the rate of change of demand with respect to price. Student Response A. D'(p) = -6p 2 + 4 B. D'(p) = -3p 2 + 4 C. D'(p) = -3p + 4 D. D'(p) = -6p + 4 Score: 21. Decide whether the limit exists. If it exists, find its value. 4/4 Feedback Find f(x) and f(x)...
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