(a) Use the trapezoidal rule to find the area under the curve y=x2+1 from x=1 to x=15 using seven strips.(b) The cross-sectional area in m2 along the length of an 18 m wooden log are: 5.0, 5.4, 7.0, 8.0, 5.5, 5.8, 6.0 The cross-sectional areas are equally spaced. The first and the last areas represent the ends of the log. Estimate its volume using the trapezoidal rule.
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