1. Data Analysis The factory sales S of VCRS (in millions of dollars) in the United States from 1990 to 2004 can be
modeled by S = -28.40t2 +218.1t+2435, for 0 St≤ 14, where t is the year, with t=0 corresponding to
1990.
a. According to the model, when (what year) did the maximum value of factory sales of VCRS occur?
b. According to the model, what was the value of the factory sales in 2004? Explain your result.
c. Would you use the model to predict the value of factory sales for years beyond 2004? Explain.