Unit . Test: Applications of Integration 1) The base of a solid is the region in the first quadrant bounded by the line y =- 2x + 2, the x axis and the y axis. If every cross section perpendicular to the x-axis is a square, which of the following integrals represents the volume of the solid. y ( 4 x + 2) -dx 2 x X 4 2 4 A. [- -x + 2]dx B.J [- -x + 2]dx C. S[- 1x + 2]2dx D. S [ - 4x + 212dx 0 0 0 2) Gas is being pumped into your car's gas tank at a rate of r(t) gallons per minute, where t is the time in minutes. What does the expression represent in context of the scenario? 2 between fr ( t ) dt = 3.5_gallons 1 A. The gas in the tank increased by 3.5 gallons between the first and second minute. 1 and 2 minutes