Alake near the arctic circle is covered by a 2-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 3 weeks, the sheet is only 1.25 meters thick. let s(t) denote the ice sheet's thickness, s (measured in meters) as a function of time, t (measured in weeks). write the functions formula and you : 3