The area of a region under a curve is greater than the area of an inscribed rectangle and less than the area of a circumscribed rectangle. Intuitively, we understand that somewhere ?between? the inscribed and circumscribed rectangles there is a rectangle whose area is precisely equal to the area of the region under the curve

Problem The area of a region under a curve is greater than the area of an inscribed rectangle and less than the area of a circumscribed rectangle. lntuitively, we understand that somewhere "between\" the inscribed and circumscribed rectangles there is a rectangle whose area is precisely equal to the area of the region under the curve: f(c) b fa fwd-\"B =f(0)(ba) The average value of a function on the interval [a; b] is determined by Average value = f: f (as) da: The efficiency e (in % ) of an automobile engine is given by e = 0.7685 _ (10000433 , where s is the speed (in km/h) of the car. Find the average efciency with respect to the speed for s = 34. km/h to .s = 89 km/h. Round the answer to one decimal place