Propane is pumped into a tank at a constant rate of 6 gallons per minute. Propane leaks out of the tank at a rate of L (t) = gallons per minute. At t=0 the tank contains 20 gallons of propane. a. How many gallons of propane are pumped into the tank during the first 8 minutes? gallons b. Use a Trapezoid Riemann Sum with 4 trapezoids to estimate the amount of propane that leaks out of the tank during the first 8 minutes. Round in the last step to 4 decimal places. c. Use your estimate in b to approximate how many gallons of propane are in the tank at t = 8? gallons

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