In 2003, National Textile installed a new machine in one of its factories at a cost of $250,000. The machine depreciated linearly over 10 yr with a scrap value of $10,000 (a) Find an expression V(t) for the machine's book value in the th year of use (0 St≤ 10). (b) Sketch the graph of the function of part (a). (Use a line.)