9 4 An environmental engineer has obtained a bacteria culture from a municipal water sample and allowed the bacteria to grow within a petri dish. The following data were obtained: Time (min) Bacteria Concentration (ppm) Time (min) Bacteria Concentration (ppm) 0 6 6 63 1 7 102 2 15 8 153 3 19 9 220 32 10 328 5 42 Enter the data into an Excel worksheet and plot the data using arithmetic scale, semi-log coordinates, and log-log coordinates. Use the resulting graphs to solve the following problem: Suppose the growth of Type A bacteria is governed by a process described by the equation CA = act and the growth of Type B bacteria is governed by a process described by the equation CB = at’. Based solely on the plots obtained, what type of bacteria is the engineer dealing with? Why? Explain using the space below.