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NCSU MA 242 - Section 11.5

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5/10/12 9:46 PMSection 11.5Page 1 of 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=3769834Current Score : 17 / 17 Due : Monday, February 27 2012 11:04 PM EST1. 4/4 points | Previous AnswersUse the Chain Rule to find z/ s and z/ t. (Your answers should be in terms of s and t only.)z = x/y, x = set, y = 1 + se-tz/ s = z/ t = 2. 2/2 points | Previous AnswersLet W(s, t) = F(u(s, t), v(s, t)), where u(1, 0) = 2, us(1, 0) = -2, ut(1, 0) = 6, v(1, 0) = 3, vs(1, 0) = 5,vt(1, 0) = 4, Fu(2, 3) = -1, and Fv(2, 3) = 10. Find the following.Ws(1, 0) = 52 52 Wt(1, 0) = 34 343. 2/2 points | Previous AnswersUse the Chain Rule to find the u/ s and u/ t when s = 0 and t = 6.u = xy + yz + zxx = sty = estz = t2u/ s = 432 438 u/ t = 12 12Section 11.5 (Homework)Ali Al ZaabiMA 242, section 001, Spring 2012Instructor: J. Louis CappsWebAssignThe due date for this assignment is past. Your work can be viewed below, but no changes can be made.5/10/12 9:46 PMSection 11.5Page 2 of 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=37698344. 3/3 points | Previous AnswersUse Equation 6 to find dy/dx.y5 + x2y3 = 1 + yex2dy/dx = 5. 3/3 points | Previous AnswersThe radius of a right circular cone is increasing at a rate of 1.8 in/s while its height is decreasing at arate of 2.5 in/s. At what rate is the volume of the cone changing when the radius is 120 inches and theheight is 144 inches?27445 27445 in3/s6. 3/3 points | Previous AnswersThe voltage V in a simple electrical circuit is slowly decreasing as the battery wears out. The resistanceR is slowly increasing as the resistor heats up. Use Ohm's Law, V = IR, to find how the current I ischanging at the moment when R = 400 , I = 0.08 A, dV/dt = -0.01 V/s, and dR/dt = 0.03 /s.-0.000031 -0.000031


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NCSU MA 242 - Section 11.5

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