Function $f$ is known at the following points:
The value of $\int_{0}^{3} f(x) \text{d}x$ computed using the trapezoidal rule is (A) 8.983 (B) 9.003 (C) 9.017 (D) 9.045
= Δx/2(f(0) + 2(f(0.3) + .... + f(2.7)) + f(3.0))
= 0.15(0 + 2(0.09 + 0.36 + 0.81 + 1.44 + 2.25 + 3.24 + 4.41 + 5.76 + 7.29) + 9.00)
= 9.045
http://tutorial.math.lamar.edu/Classes/CalcII/ApproximatingDefIntegrals.aspx