, 22.06.2019 20:00 DessAnnette2751

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Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).
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Oora boat travels 15 miles upstream and returns. if the boat travels 14 mph in still water,the speed of the current if the total trip takes 2 hours 20 minutes.​
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A17 feet ladder is placed against a building. the top of the ladder is slipping down the building at a rate of 5 feet per second. find the rate at which the bottom of the ladder is sliding away the building at the instant when the bottom of the ladder is 15 feet from the base of the building
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