Pearson eText for Calculus & Its Applications -- Instant Access (Pearson+)
14th Edition
ISBN: 9780137400096
Author: Larry Goldstein, David Lay
Publisher: PEARSON+
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Textbook Question
Chapter 9.1, Problem 14E
Determine the
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A ladder 27 feet long leans against a wall and the foot of the ladder is sliding away at a constant rate of 3 feet/sec. Meanwhile, a firefighter is climbing up the ladder at a rate of 2 feet/sec. When the firefighter has climbed up 6 feet of the ladder, the ladder makes an angle of л/3 with the ground. Answer the two related
rates questions below. (Hint: Use two carefully labeled similar right triangles.)
(a) If h is the height of the firefighter above the ground, at the instant the angle of the ladder with the ground is л/3, find dh/dt=
feet/sec.
(b) If w is the horizontal distance from the firefighter to the wall, at the instant the angle of the ladder with the ground is л/3, find dw/dt=
feet/sec.
Two cars start moving from the same point. One travels south at 60 mi/h and the other travels west at 25 mi/h. At what rate (in mi/h) is the distance between the cars increasing four hours later?
Step 1
Using the diagram of a right triangle given below, the relation between x, y, and z is
z²
= x²+
+12
x
Step 2
We must find dz/dt. Differentiating both sides and simplifying gives us the following.
2z
dz
dt
dx
2x.
+2y
dt
dx
dy
dz
x
+y
dt
dt
dt
2z
dy
dt
×
dx
(x+y
dt
dy
dt
An elastic rope is attached to the ground at the positions shown in the picture. The rope is being pulled up along the dotted line. Assume the units are meters.
9
ground level
Assume that x is increasing at a rate of 3 meters/sec.
(a) Write as a function of x: 0=
(b) When x=10, the angle is changing at a rate of
rad/sec.
(c) Let L be the the left hand piece of rope and R the right hand piece of rope. When x=10, is the rate of change of L larger than the rate of change of R?
○ Yes
○ No
Chapter 9 Solutions
Pearson eText for Calculus & Its Applications -- Instant Access (Pearson+)
Ch. 9.1 - (Review) Differentiate the following functions:...Ch. 9.1 - Use the substitution u=3x to determine e3/xx2dx.Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...
Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Determine the integrals in Exercises 136 by making...Ch. 9.1 - Figure 1 shows graphs of several functions f(x)...Ch. 9.1 - Figure 2 shows graphs of several functions f(x)...Ch. 9.1 - Determine the following integrals using the...Ch. 9.1 - Determine the following integrals using indicated...Ch. 9.1 - Determine the following integrals using the...Ch. 9.1 - Determine the following integrals using the...Ch. 9.1 - Determine the following integrals by making an...Ch. 9.1 - Prob. 44ECh. 9.1 - Prob. 45ECh. 9.1 - Determine the following integrals by making an...Ch. 9.1 - Prob. 47ECh. 9.1 - Prob. 48ECh. 9.1 - Determine the following integrals by making an...Ch. 9.1 - Prob. 50ECh. 9.1 - Prob. 51ECh. 9.1 - Prob. 52ECh. 9.1 - Determine 2x(x2+5)dx by making a substitution....Ch. 9.2 - Evaluate the following integral. xe3xdxCh. 9.2 - Evaluate the following integral. lnxdxCh. 9.2 - Evaluate the following integral. xe5xdxCh. 9.2 - Evaluate the following integral. xex2dxCh. 9.2 - Evaluate the following integral. x(x+7)4dxCh. 9.2 - Evaluate the following integral. x(2x+3)...Ch. 9.2 - Evaluate the following integral. xexdxCh. 9.2 - Evaluate the following integral. x2exdxCh. 9.2 - Evaluate the following integral. xx+1dxCh. 9.2 - Evaluate the following integral. x3+2xdxCh. 9.2 - Evaluate the following integral. e2x(13x)dxCh. 9.2 - Evaluate the following integral. (1+x)2e2xdxCh. 9.2 - Evaluate the following integral. 6xe3xdxCh. 9.2 - Evaluate the following integral. x+2e2xdxCh. 9.2 - Evaluate the following integral. xx+1dxCh. 9.2 - Evaluate the following integral. x2xdxCh. 9.2 - Evaluate the following integral. xlnxdxCh. 9.2 - Evaluate the following integral. x5lnxdxCh. 9.2 - Evaluate the following integral. xcosxdxCh. 9.2 - Evaluate the following integral. xsin8xdxCh. 9.2 - Evaluate the following integral. xln5xdxCh. 9.2 - Evaluate the following integral. x3lnxdxCh. 9.2 - Evaluate the following integral. lnx4dxCh. 9.2 - Evaluate the following integral. ln(lnx)xdxCh. 9.2 - Evaluate the following integral. x2exdxCh. 9.2 - Evaluate the following integral. lnx+1dxCh. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Evaluate the following integral using techniques...Ch. 9.2 - Figure 1 shows graphs of several functions f(x)...Ch. 9.2 - Figure 2 shows graphs of several functions f(x)...Ch. 9.2 - Evaluate xex(x+1)2dx using integration by parts....Ch. 9.2 - Evaluate x7ex4dx. [Hint: First, make a...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Prob. 4ECh. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Prob. 8ECh. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Prob. 13ECh. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals:...Ch. 9.3 - Evaluate the following definite integrals: 1elnxdxCh. 9.3 - Prob. 17ECh. 9.3 - Prob. 18ECh. 9.3 - Prob. 19ECh. 9.3 - Prob. 20ECh. 9.3 - Prob. 21ECh. 9.3 - Prob. 22ECh. 9.3 - Prob. 23ECh. 9.3 - In Exercises 24 and 25, find the area of the...Ch. 9.3 - Prob. 25ECh. 9.4 - Consider 13.4(5x9)2dx. Divide the interval 1x3.4...Ch. 9.4 - Prob. 2CYUCh. 9.4 - Prob. 3CYUCh. 9.4 - Prob. 4CYUCh. 9.4 - Prob. 5CYUCh. 9.4 - Prob. 1ECh. 9.4 - Prob. 2ECh. 9.4 - Prob. 3ECh. 9.4 - Prob. 4ECh. 9.4 - Prob. 5ECh. 9.4 - Refer to the graph in Fig. 11. Apply the...Ch. 9.4 - Prob. 7ECh. 9.4 - Prob. 8ECh. 9.4 - Prob. 9ECh. 9.4 - Prob. 10ECh. 9.4 - Prob. 11ECh. 9.4 - Prob. 12ECh. 9.4 - Prob. 13ECh. 9.4 - Prob. 14ECh. 9.4 - Prob. 15ECh. 9.4 - Approximate the following integrals by the...Ch. 9.4 - Approximate the following integrals by the...Ch. 9.4 - Prob. 18ECh. 9.4 - Prob. 19ECh. 9.4 - Prob. 20ECh. 9.4 - Prob. 21ECh. 9.4 - Prob. 22ECh. 9.4 - The following integrals cannot be evaluated in...Ch. 9.4 - Prob. 24ECh. 9.4 - Prob. 25ECh. 9.4 - Area To determine the amount of water flowing down...Ch. 9.4 - Distance Traveled Upon takeoff, the velocity...Ch. 9.4 - Prob. 28ECh. 9.4 - Prob. 29ECh. 9.4 - Consider 12f(x)dx, where f(x)=3lnx. Make a rough...Ch. 9.4 - Prob. 31ECh. 9.4 - Prob. 32ECh. 9.4 - Prob. 33ECh. 9.4 - Prob. 34ECh. 9.4 - Prob. 35ECh. 9.4 - Prob. 36ECh. 9.4 - Technology Exercises In Exercises 3740,...Ch. 9.4 - Prob. 38ECh. 9.4 - Prob. 39ECh. 9.4 - Prob. 40ECh. 9.4 - Prob. 41ECh. 9.4 - Prob. 42ECh. 9.5 - The integral formula is used in many applications...Ch. 9.5 - Present value Find the present value of a...Ch. 9.5 - Present valueA continuous stream of income is...Ch. 9.5 - Present valueFind the present value of a...Ch. 9.5 - Prob. 4ECh. 9.5 - Present value Find the present value of a...Ch. 9.5 - Present valueA continuous stream of income is...Ch. 9.5 - Prob. 7ECh. 9.5 - Prob. 8ECh. 9.5 - Prob. 9ECh. 9.5 - Prob. 10ECh. 9.5 - Prob. 11ECh. 9.5 - Prob. 12ECh. 9.5 - Prob. 13ECh. 9.6 - Prob. 1CYUCh. 9.6 - Prob. 2CYUCh. 9.6 - Prob. 3CYUCh. 9.6 - In Exercises 1-12, determine if the given...Ch. 9.6 - Prob. 2ECh. 9.6 - Prob. 3ECh. 9.6 - Prob. 4ECh. 9.6 - Prob. 5ECh. 9.6 - Prob. 6ECh. 9.6 - Prob. 7ECh. 9.6 - Prob. 8ECh. 9.6 - Prob. 9ECh. 9.6 - In Exercises 1-12, determine if the given...Ch. 9.6 - Prob. 11ECh. 9.6 - Prob. 12ECh. 9.6 - Find the area under the graph of y=1x2forx2.Ch. 9.6 - Prob. 14ECh. 9.6 - Find the area under the graph of y=ex/2forx0.Ch. 9.6 - Prob. 16ECh. 9.6 - Prob. 17ECh. 9.6 - Prob. 18ECh. 9.6 - Prob. 19ECh. 9.6 - Prob. 20ECh. 9.6 - Evaluate the following improper integrals whenever...Ch. 9.6 - Prob. 22ECh. 9.6 - Evaluate the following improper integrals whenever...Ch. 9.6 - Prob. 24ECh. 9.6 - Evaluate the following improper integrals whenever...Ch. 9.6 - Prob. 26ECh. 9.6 - Prob. 27ECh. 9.6 - Prob. 28ECh. 9.6 - Evaluate the following improper integrals whenever...Ch. 9.6 - Prob. 30ECh. 9.6 - Evaluate the following improper integrals whenever...Ch. 9.6 - Prob. 32ECh. 9.6 - Evaluate the following improper integrals whenever...Ch. 9.6 - Prob. 34ECh. 9.6 - Prob. 35ECh. 9.6 - Prob. 36ECh. 9.6 - Prob. 37ECh. 9.6 - Prob. 38ECh. 9.6 - Evaluate the following improper integrals whenever...Ch. 9.6 - Prob. 40ECh. 9.6 - Prob. 41ECh. 9.6 - Prob. 42ECh. 9.6 - Prob. 43ECh. 9.6 - Prob. 44ECh. 9.6 - Prob. 45ECh. 9.6 - Prob. 46ECh. 9.6 - Prob. 47ECh. 9.6 - Prob. 48ECh. 9.6 - Prob. 49ECh. 9.6 - Prob. 50ECh. 9 - Describe integration by substitution in your own...Ch. 9 - Prob. 2CCECh. 9 - Prob. 3CCECh. 9 - Prob. 4CCECh. 9 - Prob. 5CCECh. 9 - Prob. 6CCECh. 9 - Prob. 7CCECh. 9 - Prob. 8CCECh. 9 - Prob. 9CCECh. 9 - Prob. 10CCECh. 9 - Determine the following indefinite integral:...Ch. 9 - Determine the following indefinite integral:...Ch. 9 - Determine the following indefinite integral:...Ch. 9 - Determine the following indefinite integral:...Ch. 9 - Determine the following indefinite integral:...Ch. 9 - Determine the following indefinite integral:...Ch. 9 - Determine the following indefinite integral:...Ch. 9 - Determine the following indefinite integral:...Ch. 9 - Determine the following indefinite integral:...Ch. 9 - Prob. 10RECh. 9 - Prob. 11RECh. 9 - Prob. 12RECh. 9 - Prob. 13RECh. 9 - Prob. 14RECh. 9 - Prob. 15RECh. 9 - Prob. 16RECh. 9 - Prob. 17RECh. 9 - Determine the following indefinite integral:...Ch. 9 - Prob. 19RECh. 9 - Prob. 20RECh. 9 - Prob. 21RECh. 9 - Prob. 22RECh. 9 - Prob. 23RECh. 9 - Prob. 24RECh. 9 - Prob. 25RECh. 9 - Prob. 26RECh. 9 - Prob. 27RECh. 9 - Prob. 28RECh. 9 - Prob. 29RECh. 9 - Prob. 30RECh. 9 - Prob. 31RECh. 9 - Prob. 32RECh. 9 - Prob. 33RECh. 9 - Prob. 34RECh. 9 - Prob. 35RECh. 9 - Prob. 36RECh. 9 - Evaluate the following definite integrals:...Ch. 9 - Prob. 38RECh. 9 - Prob. 39RECh. 9 - Prob. 40RECh. 9 - Prob. 41RECh. 9 - Prob. 42RECh. 9 - Prob. 43RECh. 9 - Prob. 44RECh. 9 - Prob. 45RECh. 9 - Prob. 46RECh. 9 - Evaluate the following improper integrals whenever...Ch. 9 - Prob. 48RECh. 9 - Prob. 49RECh. 9 - Prob. 50RECh. 9 - Prob. 51RECh. 9 - Prob. 52RECh. 9 - Prob. 53RECh. 9 - Prob. 54RECh. 9 - Prob. 55RECh. 9 - Prob. 56RECh. 9 - Prob. 57RECh. 9 - Prob. 58RE
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