Two climbers are at the top of mount everest, the highest peak in the world. they begin their descent and climb at an average rate of 280.7 feet per hour, heading down to the base. after two days, they've completed 7 hours of climbing. which rational number represents the change in their altitude (in feet)?

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?