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Exercise 8.2.4 Meaning (signed area) Click on the link to examine the graphs _ of ry(x) and f(x). The function f gives Stefan's displacement, in miles, to the North of his house a hours since he started walking. The function r (r, defined as r,(x) = sin(5x) - 2.5 ) is the exact rate of change function for f with respect to r. f. What is the signed area? int_0^xf[t)dt? Preview