In the beginning, there were approximately 109 million cell phone users in the United States. The number of cell phone users grew to approximately 300 million in 10 years. Write an exponential model that represents the number of cell phone users in the United States, where t represents the number of years. The base of your exponential model should be correct to three places after the decimal point.

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?