Using n=4 equal-width subintervals, approximate the area of the region bounded by the graph of, ƒ(x) = x² + 4, and the coordinate axes (the shaded region in the figure below). Use the left endpoint of each subinterval to determine the height of each rectangle in your approximation. 24+ 22+ 20+ 18+ 16+ 14+ 12- 10+ 8+ 6- y y = x²+4

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