v}- HUA' v A..." V'l x-- -1. \_ ..J u 9. According to the CDC, in 1997 about 19,751 cases of tuberculosis were reported in the US. In 2009, there were 11,520 cases. n09" a. Find an equation that can be used as a mode] in exponential function form. {round you: rate to the 4'11 decimal place) b. Use the model to predict the number of cases in 2012. c. In what year will the number of cases drop to 7,000