A warehouse contains 55 boxes. Then a truck delivers a number of boxes at 12:00 p.m. and the team begins to unload them immediately. By 3:00 p.m., the ware house contains 90 boxes. Suppose the boxes are unloaded at a constant rate. Write a formula that shows the total number of boxes in the warehouse as a function of time where Q(t) is the total number of boxes, and t is the time since noon.