Discrete Mathematics with Graph Theory (Classic Version) (3rd Edition) (Pearson Modern Classics for Advanced Mathematics Series)
3rd Edition
ISBN: 9780134689555
Author: Edgar Goodaire, Michael Parmenter
Publisher: PEARSON
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Chapter 4.3, Problem 9E
(a)
To determine
The range of
(b)
To determine
If
(c)
To determine
If
(d)
To determine
Why did we not express f as a function
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Habitat for Humanity International is a nonprofit organization dedicated to eliminating poverty housing worldwide. Suppose the following table contains estimates of activity times (in days) involved in the construction of a house that Habitat for Humanity is building.
Activity Optimistic Most Probable Pessimistic
A
6
7.0
8
B
7
8.0
9
C
7
7.5
11.5
D
7
9.0
10
E
6
7.0
9
F
3
4.0
5
(a) Compute the expected activity completion times and the variance for each activity. (Round your answers to two decimal places.)
Activity
Expected
Times
A
B
C
D
E
F
Variance
(b) An analyst determined that the critical path consists of activities B-D-F. Compute the expected project completion time and the variance of this path. (Round your answers to two decimal places.)
expected project completion time
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G
A
B
CD
E
A A
C, B C, B
D, E
Time
4
6
2
6
3
3
5
(a) Find the critical path. (Enter your answers as a comma-separated list.)
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Chapter 4 Solutions
Discrete Mathematics with Graph Theory (Classic Version) (3rd Edition) (Pearson Modern Classics for Advanced Mathematics Series)
Ch. 4.1 - 227Ch. 4.1 - The Well-Ordering Principle states that any...Ch. 4.1 - Prob. 3TFQCh. 4.1 - Prob. 4TFQCh. 4.1 - Prob. 5TFQCh. 4.1 - Prob. 6TFQCh. 4.1 - Prob. 7TFQCh. 4.1 - Prob. 8TFQCh. 4.1 - Prob. 9TFQCh. 4.1 - Prob. 10TFQ
Ch. 4.1 - Prob. 1ECh. 4.1 - 2. True or false? If false, give a counterexample....Ch. 4.1 - Prob. 3ECh. 4.1 - Prob. 4ECh. 4.1 - Prob. 5ECh. 4.1 - Prob. 6ECh. 4.1 - Prob. 7ECh. 4.1 - Prob. 8ECh. 4.1 - 9. Suppose is a natural number and is the...Ch. 4.1 - Prob. 10ECh. 4.1 - Prob. 11ECh. 4.1 - Prob. 12ECh. 4.2 - True/False Questions
Given two consecutive...Ch. 4.2 - Prob. 2TFQCh. 4.2 - Prob. 3TFQCh. 4.2 - Prob. 4TFQCh. 4.2 - Prob. 5TFQCh. 4.2 - Prob. 6TFQCh. 4.2 - Prob. 7TFQCh. 4.2 - Prob. 8TFQCh. 4.2 - Prob. 9TFQCh. 4.2 - Prob. 10TFQCh. 4.2 - Prob. 1ECh. 4.2 - Prob. 2ECh. 4.2 - Draw the Hasse diagrams for each of the following...Ch. 4.2 - List all minimal, minimum, maximal, and maximum...Ch. 4.2 - Let n be a natural number. Given n consecutive...Ch. 4.2 - Prove that n22(n an integer) is never divisible by...Ch. 4.2 - Given that a and x are integers, a1, a|(11x+3),...Ch. 4.2 - Prob. 8ECh. 4.2 - Prob. 9ECh. 4.2 - Prob. 10ECh. 4.2 - Prob. 11ECh. 4.2 - Prob. 12ECh. 4.2 - Prob. 13ECh. 4.2 - If a and b are relatively prime integers, prove...Ch. 4.2 - Prob. 15ECh. 4.2 - Prob. 16ECh. 4.2 - 17. (a) Find a pair of integers and such that ....Ch. 4.2 - Prob. 18ECh. 4.2 - Prob. 19ECh. 4.2 - Prob. 20ECh. 4.2 - Prob. 21ECh. 4.2 - If aN, prove that...Ch. 4.2 - Prob. 23ECh. 4.2 - Prob. 24ECh. 4.2 - Prob. 25ECh. 4.2 - Prob. 26ECh. 4.2 - Prob. 27ECh. 4.2 - Prob. 28ECh. 4.2 - Prob. 29ECh. 4.2 - Prob. 30ECh. 4.2 - Establish formula (2) of this section by proving...Ch. 4.2 - Prob. 32ECh. 4.2 - Suppose a,b,c are nonzero integers. Show that...Ch. 4.2 - 34. Suppose that and are partial orders.
(a)...Ch. 4.2 - Prob. 35ECh. 4.2 - Let g be the greatest common divisor of integers m...Ch. 4.3 - 127 is a prime number.Ch. 4.3 - Prob. 2TFQCh. 4.3 - Prob. 3TFQCh. 4.3 - Prob. 4TFQCh. 4.3 - Prob. 5TFQCh. 4.3 - Prob. 6TFQCh. 4.3 - Prob. 7TFQCh. 4.3 - Prob. 8TFQCh. 4.3 - Prob. 9TFQCh. 4.3 - Prob. 10TFQCh. 4.3 - Determine whether each of the following integers...Ch. 4.3 - Prob. 2ECh. 4.3 - Suppose p is the smallest prime factor of an...Ch. 4.3 - Prob. 4ECh. 4.3 - Prob. 5ECh. 4.3 - Prob. 6ECh. 4.3 - Prob. 7ECh. 4.3 - Prob. 8ECh. 4.3 - Prob. 9ECh. 4.3 - Prob. 10ECh. 4.3 - Prob. 11ECh. 4.3 - Prob. 12ECh. 4.3 - Estimate the number of primes less than 5000, less...Ch. 4.3 - Prob. 14ECh. 4.3 - Prob. 15ECh. 4.3 - Prob. 16ECh. 4.3 - Prob. 17ECh. 4.3 - 18. (a) Is prime? Explain your answer.
(b) Is...Ch. 4.3 - Prob. 19ECh. 4.3 - Prob. 20ECh. 4.3 - 21. Show that the sum of two consecutive primes is...Ch. 4.3 - Prob. 22ECh. 4.3 - Prob. 23ECh. 4.3 - Prob. 24ECh. 4.3 - Prob. 25ECh. 4.3 - Prob. 26ECh. 4.3 - Let p1p2.......pn+1 denote the first n+1 primes...Ch. 4.3 - Prob. 28ECh. 4.3 - Prob. 29ECh. 4.3 - Let a and b be natural numbers. Find the prime...Ch. 4.3 - Prob. 31ECh. 4.3 - Prob. 32ECh. 4.3 - 33. Show that there are infinitely many triples of...Ch. 4.3 - Prob. 34ECh. 4.3 - Prob. 35ECh. 4.3 - 36. Let denote the set of positive rational...Ch. 4.3 - Prob. 37ECh. 4.3 - Prob. 38ECh. 4.4 - A 2003 country music hit by Alan Jackson and Jimmy...Ch. 4.4 - Prob. 2TFQCh. 4.4 - Prob. 3TFQCh. 4.4 - 4.
Ch. 4.4 - Prob. 5TFQCh. 4.4 - There are 72 congruence classes of integers mod...Ch. 4.4 - Prob. 7TFQCh. 4.4 - Prob. 8TFQCh. 4.4 - Prob. 9TFQCh. 4.4 - Prob. 10TFQCh. 4.4 - Prob. 1ECh. 4.4 - Prob. 2ECh. 4.4 - Prob. 3ECh. 4.4 - 4. True or False? Give a reason for each answer....Ch. 4.4 - Prob. 5ECh. 4.4 - Prob. 6ECh. 4.4 - Prob. 7ECh. 4.4 - Prob. 8ECh. 4.4 - Find all integers x, 0xn, satisfying each of the...Ch. 4.4 - 10. (a) Given integers and a prime , suppose ....Ch. 4.4 - 11. Find all integers and, , that satisfy each of...Ch. 4.4 - Prob. 12ECh. 4.4 - Prob. 13ECh. 4.4 - Prob. 14ECh. 4.4 - Prob. 15ECh. 4.4 - Prob. 16ECh. 4.4 - Prob. 17ECh. 4.4 - Find all integers x, 0xn, that satisfy each of the...Ch. 4.4 - Find all integers x,0xn, that satisfy each of the...Ch. 4.4 - Find all integers x,0xn, that satisfy each of the...Ch. 4.4 - In each case, find the inverse of a(modn) and use...Ch. 4.4 - In each of the following the given integer p is a...Ch. 4.4 - 23. Show that has no solutions.
Ch. 4.4 - 24. Let A be the set of congruence classes of...Ch. 4.5 - Prob. 1TFQCh. 4.5 - Prob. 2TFQCh. 4.5 - Prob. 3TFQCh. 4.5 - Prob. 4TFQCh. 4.5 - Prob. 5TFQCh. 4.5 - Prob. 6TFQCh. 4.5 - Prob. 7TFQCh. 4.5 - Prob. 8TFQCh. 4.5 - Prob. 9TFQCh. 4.5 - Prob. 10TFQCh. 4.5 - Prob. 1ECh. 4.5 - Prob. 2ECh. 4.5 - Prob. 3ECh. 4.5 - Prob. 4ECh. 4.5 - Prob. 5ECh. 4.5 - Prob. 6ECh. 4.5 - Prob. 7ECh. 4.5 - Prob. 8ECh. 4.5 - Prob. 9ECh. 4.5 - Prob. 10ECh. 4.5 - Prob. 11ECh. 4.5 - Prob. 12ECh. 4.5 - Prob. 13ECh. 4.5 - Prob. 14ECh. 4.5 - Prob. 15ECh. 4.5 - Prob. 16ECh. 4.5 - Prob. 17ECh. 4.5 - 18. In each case, find the smallest nonnegative...Ch. 4.5 - For each of the following, find the smallest...Ch. 4.5 - Prob. 20ECh. 4.5 - In each of the following cases, find a positive...Ch. 4.5 - Prob. 22ECh. 4.5 - Prob. 23ECh. 4.5 - Prob. 24ECh. 4.5 - 25. Suppose. Decode each of the following encoded...Ch. 4 - Find the quotient and remainder when...Ch. 4 - Convert (1100101)2 to base 10. Convert 32,145 to...Ch. 4 - Prob. 3RECh. 4 - An integer n, which has exactly eight factors, is...Ch. 4 - Prob. 5RECh. 4 - Prob. 6RECh. 4 - Prob. 7RECh. 4 - Prob. 8RECh. 4 - Illustrate the Euclidean algorithm by showing that...Ch. 4 - Prob. 10RECh. 4 - Prob. 11RECh. 4 - Prob. 12RECh. 4 - 13. Suppose. Show that is not the sum of three...Ch. 4 - Prob. 14RECh. 4 - Prob. 15RECh. 4 - Prob. 16RECh. 4 - Prob. 17RECh. 4 - 18. What is the last digit of ? [Hint: You want...Ch. 4 - Prob. 19RECh. 4 - Prob. 20RECh. 4 - Compute 380(mod7). Find all integers x such that...Ch. 4 - Prob. 22RECh. 4 - Prob. 23RECh. 4 - Prob. 24RECh. 4 - Prob. 25RECh. 4 - Prob. 26RECh. 4 - Find the smallest positive integer x that...
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- To help with preparations, a couple has devised a project network to describe the activities that must be completed by their wedding date. In addition, they have estimated the time of each activity (in weeks). Start D F B E G Activity A B C DEFGH Time 5 3 6 6 6 3 11 10 (a) Identify the critical path. (Enter your answers as a comma-separated list.) H Finish (b) How much time (in weeks) will be needed to complete this project? week(s) (c) Can activity D be delayed without delaying the entire project? If so, by how many weeks? (If the activity can not be delayed, enter 0.) week(s) (d) Can activity C be delayed without delaying the entire project? If so, by how many weeks? (If the activity can not be delayed, enter 0.) week(s) (e) What is the schedule for activity E (in weeks)? Earliest Start Latest Start Earliest Finish Latest Finish week(s) week(s) week(s) week(s)arrow_forward30.6. Classify the zeros and singularities of the functions tanz (a). f(z)=sin(1-2-1), (b). f(2) = (c). f(z)= tanh .arrow_forward1. Locate the singularities of three of the following functions, and determine their type. (a) f(z)=2(z-sinz). (b) f(z) = (-) (c) f(z) = (z+2-22²)-1 (d) f(z) = sinzarrow_forward
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