An environmental science team is monitoring the concentration of a tracer dye (measured in parts per billion, ppb) in a section of a river following an industrial discharge experiment. The dye concentration is recorded over a 12-hour monitoring period for several groups of tracking sensors.
The results for sensors in Group A show:
The graph below represents these results:
The total exposure to the dye over time can be estimated by calculating the area under the curve (AUC). Calculate the approximate area under the curve for Group A between hour 2 and hour 12. (Ignore units in your calculation.)
The total area under the curve for Group B is calculated to be 400. Calculate the area under the curve for Group A as a proportion of the area under the curve for Group B.
