CHC Math 30-2 Book 2 Exponential Functions Page 49 10. The output of an oil well in Saskatchewan is initially 3000 barrels per week. Each week that the well operates, its output decreases by 10%. a) Determine the equation of the exponential function that models the output of the well. b) Assuming the same decrease in output, how much oil, to the nearest barrel, will be extracted from the well at the end of 20 weeks of operation? c) The oil company will close the well when its output drops to less than five barrels per week. Assuming the same decrease in output, when will the well be closed, to the nearest tenth of a week