Answer the following questions. Show all work. (6 pts) 1. If y 3x-5 3x+8 find d'y dx (5 pts) 2. If an object's position, in yards, after 1 minutes, is given by s(t)=850-80+21+3r, find the object's acceleration after 2 seconds. (Make sure to label the units.) 3. I sell small tables for $180 each. Each week, it costs me (2000+14x+0.5x) dollars to make .x tables. (4 pts) a. Find the marginal cost for making 12 tables. (5 pts) b. Find the marginal profit for making 12 tables.