A lake near the Arctic Circle is covered by sheet of ice during the cold winter months. When spring arrives, the ice starts to melt. S SS models the ice sheet's thickness (in meters) after t tt weeks. S = − 0.25 t + 4 S=−0.25t+4S, equals, minus, 0, point, 25, t, plus, 4 What is the ice sheet's thickness at the beginning of spring?

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?