34. (B)
Graph x = 4 − t^2 and y = 2t for −3 ≤ t ≤ 3 in the window [−1, 5] × [−1, 5]. Now ΔA = x Δy;
the limits of integration are the two points where the curve cuts the y-axis, that is, where x =- In terms of t, these are t 1 = 2 and t 2 = + 2. So
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