1. True or False The Trapezoidal Rule approximates an integral $\int_{a}^{b}f(x)\,dx$ by replacing the graph of $f$ with line segments.

2. True or False Simpson’s Rule approximates an integral by using parabolic arcs.

3. Use the Trapezoidal Rule with $n$ = 3 and $n$ = 6 to approximate the area under the graph.

4. Use the Trapezoidal Rule with $n$ = 2 and $n$ = 4 to approximate the area under the graph.

5. Use Simpson’s Rule with $n$ = 2 and $n$ = 6 to approximate the area under the graph.

6. Use Simpson’s Rule with $n$ = 2 and $n$ = 4 to approximate the area under the graph.

7. $\int_{\pi /2}^{\pi}\dfrac{\sin x}{x}dx$; $n$ = 3

8. $\int_{3\pi /2}^{2\pi }\dfrac{\cos x}{x}dx$; $n$ = 3

9. $\int_{0}^{1}e^{-x^{2}}\,dx$; $n$ = 4

10. $\int_{0}^{1}e^{x^{2}}\,dx$; $n$ = 4

11. $\int_{-1}^{0}\dfrac{dx}{\sqrt{1-x^{3}}};$ $n$ = 4

12. $\int_{0}^{1}\dfrac{dx}{\sqrt{1+x^{3}}};$ $n$ = 3

13. $\int_{1}^{2}\dfrac{e^x}{x}\,dx$; $n$ = 4

14. $\int_{3\pi/2}^{2\pi} \dfrac{\cos x}{x} dx$; $n$ = 4

15. $\int_{0}^{1}e^{-x^{2}}\,dx$; $n$ = 4

16. $\int_{0}^{1}e^{x^{2}}\,dx$; $n$ = 4

17. $\int^{0}_{-1}\dfrac{dx}{\sqrt{1-x^3}}$; $n$ = 4

18. $\int_{0}^{1}\dfrac{dx}{\sqrt{1+x^2}}$; $n$ = 4

19. 1. (a) Show that $\int_{1}^{2}\,\dfrac{dx}{x}=\ln 2.$
    2. (b) Use the Trapezoidal Rule with $n = 5$ to approximate $\int_{1}^{2}\,\dfrac{dx}{x}.$
    3. (c) Use Simpson’s Rule with $n = 6$ to approximate $\int_{1}^{2}\dfrac{\,dx}{x}$.

20. Area Selected measurements of a function $f$ are given in the table below. Use Simpson’s Rule to approximate the area enclosed by the graph of $f$, the $x$-axis, and the lines $x = 2$ and $x = 4.4$.

    $x$	2.0	2.4	2.8	3.2	3.6	4.0	4.4
    $y$	3.03	4.61	5.80	6.59	7.76	8.46	9.19

21. Arc Length Approximate the arc length of the graph of $y = \sin x$ from $x = 0$ to $x = \dfrac{\pi}{2}$

    1. (a) using Simpson’s Rule with $n = 4$.
    2. (b) using the Trapezoidal Rule with $n = 3$.

22. Arc Length Approximate the arc length of the graph of $y=e^{x}$ from $x = 0$ to $x = 4$

    1. (a) using Simpson’s Rule with $n = 4$.
    2. (b) using the Trapezoidal Rule with $n = 8$.

23. Work A gas expands from a volume of $1$ cubic inch (in.$^{3})$ to 2.5 in.$^{3}$; values of the volume $V$ and pressure $p$ (in pounds per square inch) during the expansion are given in the table below. Find the total work $W$ done in the expansion using Simpson’s Rule. (Hint: $W=\int_{a}^{b}p\,dV)$.

    $V$	$1$	$1.25$	$1.5$	$1.75$	$2$	$2.25$	$2.5$
    $p$	68.7	55.0	45.8	39.3	34.4	30.5	27.5

24. Work In the table below, $F$ is the force in pounds acting on an object in its direction of motion and $x$ is the displacement of the object in feet. Use the Trapezoidal Rule to approximate the work done by the force in moving the object from $x = 0$ to $x = 50$.

    $x$	0	5	10	15	20	25	30	35	40	45	50
    $F$	100	80	66	56	50	45	40	36	33	30	28

519

25. Volume In the table below, $S$ is the area in square meters of the cross section of a railroad track cutting through a mountain, and $x$ meters is the corresponding distance along the line. Use the Trapezoidal Rule to find the number of cubic meters of earth removed to make the cutting from $x = 0$ to $x = 150$. See the figure below.

    

    $x$	0	25	50	75	100	125	150
    $S$	105	118	142	120	110	90	78

26. Area Use Simpson’s Rule to approximate the surface area of the pond pictured in the figure.

    

27. Volume The area of the horizontal section of a reservoir is $A$ square meters at a height $x$ meters from the bottom. Corresponding values of $A$ and $x$ are given in the table below. Approximate the volume of water in the reservoir using the Trapezoidal Rule and also using Simpson’s Rule. See the figure.

    

    $x$	0	2.5	5	7.5	10	12.5	15	17.5	20	22.5	25
    $A$	0	2510	3860	4870	5160	5590	5810	6210	6890	7680	8270

28. Area A series of soundings taken across a river channel is given in the table below, where $x$ meters is the distance from one shore and $y$ meters is the corresponding depth of the water. Find its area by the Trapezoidal Rule.

    $x$	0	10	20	30	40	50	60	70	80
    $y$	5	10	13.2	15	15.6	12	6	4	0

29. Volume of a Solid of Revolution Use the Trapezoidal Rule with $n = 3$ to approximate the volume of the solid of revolution formed by revolving the region shown in the figure below about the $x$-axis.

    

30. Distance Traveled The speed $v$, in meters per second, of an object at time $t$ is given in the table below.

    $t$	0	0.5	1	1.5	2	2.5	3
    $v$	5.1	5.3	5.6	6.1	6.8	6.7	6.5

    1. (a) Use the Trapezoidal Rule to approximate the distance $s$ traveled by the object from $t = 0$ to $t = 3$.
    2. (b) Use Simpson’s Rule to approximate the distance $s$ traveled by the object from $t = 0$ to $t = 3$.

31. Volume of a Solid of Revolution Approximate the volume of the solid of revolution in the figure below generated by revolving the region bounded by the graph of $y=\sin x$ and the $y$-axis from $x = 0$ to $x=\dfrac{\pi}{2}$ about the $y$-axis

    1. (a) using Simpson’s Rule with $n = 4$.
    2. (b) using the Trapezoidal Rule with $n = 3$.

    

32. Arc Length Use the Trapezoidal Rule to find the arc length of the ellipse $9x^{2}+100y^{2}=900$ in the first quadrant from $x = 0$ to $x = 8$. Partition the interval into four equal subintervals, and round the answer to three decimal places.

33. Approximate $\int^{\pi}_0 f(x)\,dx$ if $f(x)=\left\{ \begin{array}{c@{\quad}l@{\quad}l} \dfrac{\sin x}{x} & \hbox{if} & x\neq 0 \\ 1 & \hbox{if} & x=0 \end{array} \right.$

    1. (a) Use the Trapezoidal Rule with $n = 6$.
    2. (b) Use Simpson’s Rule with $n = 6$.

34. Approximate $\int_{-1}^{1}5e^{-x^{2}}dx$.

    1. (a) Use the Trapezoidal Rule with $n = 20$ subintervals.
    2. (b) Use Simpson’s Rule with $n = 20$ subintervals.
    3. (c) Use a CAS to find the integral.

35. Let $T_{n}$ be the approximation to $\int_{a}^{b} f(x)\,dx$ given by the Trapezoidal Rule with $n$ subintervals. Without using the error formula given in the text, show that $\lim\limits_{n\,\rightarrow \,\infty}T_{n}=\int_{a}^{b}f(x)\,dx$.

36. Show that if $f(x)=Ax^{3}+Bx^{2}+Cx+D$, then Simpson’s Rule gives the exact value of $\int_{a}^{b}f(x)\,dx$.