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Let L. denote the left-endpoint sum using a subintervals and let R. denote the corresponding right-endpoint sum. In the following exercise, compute the indicated left or right sum for the given functions on the indicated interval. Round to 3 decimal places, if necessary R, for /(=) - on [ - 1, 1] Let L. denote the left-endpoint sum using a subintervals and let R, denote the corresponding right-endpoint mum. In the following exercise, compute the indicated left or right sam for the given functions on the indicated interval, Answer exactly. R, for /(s) = cos(wx) on [0, 1] The area A( t) of a circular shape is growing at a constant rate, If the area increases from ir to Gir units between times ! = 2 and t - 8, find the net change in the radius during that time