Tony makes sandwiches for a cafeteria. this morning, he made 50 roast beef sandwiches, 75 ham and cheese sandwiches, and 16 tuna sandwiches. his boss wants 150 sandwiches total. how many more sandwiches must tony make?

Felicia has a respiratory infection and has been coughing up a lot of mucus. she knows this means that her respiratory system is working to restore balance by getting rid of the invasive materials from her lungs. how does this happen?