(b)

Find new estimates using ten rectangles in each case. (Round your answers to one decimal place.)

Unless specified, all approximationg rectangles are assumed to have the same width. The graph of the function f is given. 4 y = f(x) 2 X 8 (a) By reading values from the given graph of f, use five rectangles to find a lower estimate for the area under the given graph of f, the x-axis, and the lines x = 0 and x = 10. (Round your answer to one decimal place.) 28.2 X