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An archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish’s mouth. Suppose the archerfish squirts water with a speed of 2.1 m/s at an angle of 51 degrees above the horizontal, aiming for a beetle on a leaf that is 3 cm above the water’s surface. At what horizontal distance (in cm) should the archerfish be from the beetle to minimize the time the beetle has to react?

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