3. A sky diver falls vertically downward from an airplane. The accompanying figure shows the graph of the distance s fallen by the sky diver versus the time t since leaping from the plane. (a) Use the line segment in the accompanying graph to estimate the instantaneous speed of the sky diver at time t = 5 s. DIRE (b) Estimate the instantaneous speed of the sky diver at time t = 17.5 s. What appears to be happening to the speed of the sky diver over time? 1024 800 Distance (m) 600 400 200 05 10 15 20

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