Answers+to+2009-2010+Free+Response

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Answers: AB1 a. 142.275 b. -59.583 c. 0, 0 <= t < 6 125t - 750, 6 <= t < 7 108t - 631, 7 <= t <= 9 d. 26.334 or 26.335 AB2 a. 4 b. 10.687 or 10.688 Average # entries (in hundreds) in the box between noon and 8 PM c. 700 d. midnight AB3 a. 3200 b. increasing because r(t) > 800 c. max at t = 3 1500 d. 0 = 700 + Int(r(x),x 0,t) - 800t AB4 a. 18 b. pi Int((7 - 2 sq rt(x))^2 - 1,x,0,9) c. Int(3/16 y^4,y,0,6) AB5 a. 6.5 + pi, 5 - pi b. x = 0,2,3 because the slope of g ' changes sign c. x = sq rt 2, 3 rel. max at x = sq rt 2, neither at x = 3 AB6 a. y = 8x - 6 b. 2.8 less than c. y = sq rt(4/(5 - 4x^2))