Approximate the area under the graph of F(x) = 0.9x³ +9x²

Last updated: 7/22/2022

Approximate the area under the graph of F(x) = 0.9x³ +9x² -0.9x-9 over the interval [-6, -1] using 5 subintervals. Use the left endpoints to find the heights of the rectangles. The area is approximately square units.