15 10 ny OA 28 044 OB 86 634 O C 14 439 OD 49 914 OE 57 340 10 12 tan cOS TU 3 2 27 Click here for long description Estimate the total area under this curve on the interval 0 12 with a Riemann sum uses 36 equal subdivisions and circumscribed rectangles Hint use symmetry to make this problem easier You get Area