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Wednesday, January 20 Announcements WeBWorK #2 due this evening, 9pm Solutions to (all versions of) Quiz #1 are online Pick up your quiz papers in the Math Learning Centre MLC is in the Klinck building (LSK), 3rd floor Available from 10am to 6pm, Monday through Friday Bring your student ID (and know we’re Section 211) Get your quiz from the Quick Help desk All details on the course web page Wednesday, January 20 Clicker Questions Clicker Question 1 Race to the top Suppose we know: R5 2 f (x) dx = 11 R5 2 g(x) dx = 7 R7 5 f (x) dx = 2 R7 5 g(x) dx = 3 y =f (x) y = g(x) 2 3 What is the shaded area? A. 5 = R5 2 (f (x) − g(x)) dx + B. 14 C. 23 D. 3 E. none of the above R7 5 (g(x) − f (x)) dx 4 5 6 7 Clicker Question 2 Solid of revolution What is the general formula for the volume of the solid formed by rotating, around the x-axis, the graph of y = f (x) between x = a and x = b? (Assume f (x) ≥ 0.) Z b2 π(f (x))2 dx A. a2 Z b B. πf (x) dx a Z b π(f (x))2 dx C. a Z b2 D. πf (x) dx a2 E. none of the above Clicker Question 3 Another formula from geometry What is the area of an annulus with outer radius R and inner radius r? R r A. π(R − r)2 C. 1 2 πRr D. B. 1 2 π(R + r) π(R2 − r2 ) E. none of the above