Approximate the area under the graph of f(x) = 0.04x4 -1.21x² +72 over the interval [2,6] by dividing the interval into 4 subintervals. Use the left endpoint of each subinterv The area under the graph of f(x) = 0.04x4 -1.21x² +72 over the interval [2,6] is approximately (Simplify your answer. Type an integer or a decimal.) C

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