There is a small island in the middle of 100m wide river and a tall tree stands on the island. P and q are points directly opposite to each other on the two banks and in line with the tree. If the angles of elevation of the top of the tree from p and q are respectively 30 and 60, find the height of the tree

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?