1. Mathematics
2. Calculus and Analysis
3. 2829

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Ichiro hits the ball and runs toward first base with a speed of 25 feet per second. The shortstop, who is exactly 40 feet in from third base on the baseline, gets the ball exactly 1.7 seconds after Ichiro started running (assume he runs at a constant rate.) At what rate is Ichiro's distance to the shortstop increasing at the moment the shortstop picks up the ball. (Note: A baseball diamond is a square with sides of 90 feet.)