Discrete Mathematics With Applications
5th Edition
ISBN: 9781337694193
Author: EPP, Susanna S.
Publisher: Cengage Learning,
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Chapter 9.7, Problem 29ES
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(28 points) Define T: [0,1] × [−,0] → R3 by
T(y, 0) = (cos 0, y, sin 0).
Let S be the half-cylinder surface traced out by T.
(a) (4 points) Calculate the normal field for S determined by T.
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How many apps? According to a website, the mean number of apps on a smartphone in the United States is 82. Assume
the number of apps is normally distributed with mean 82 and standard deviation 30.
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(a) What proportion of phones have more than 47 apps? Round the answer to four decimal places.
The proportion of phones that have more than 47 apps is 0.8783
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Chapter 9 Solutions
Discrete Mathematics With Applications
Ch. 9.1 - A sample space of a random process or experiment...Ch. 9.1 - An event in a sample space is .Ch. 9.1 - To compute the probability of an event using the...Ch. 9.1 - Prob. 4TYCh. 9.1 - Toss two coins 30 times and make a table showing...Ch. 9.1 - In the example of tossing two quarters, what is...Ch. 9.1 - In 3-6 use the sample space given in Example...Ch. 9.1 - In 3-6 use the sample space given in Example...Ch. 9.1 - In 3-6 use the sample space given in Example...Ch. 9.1 - In 3-6 use the sample space given in Example...
Ch. 9.1 - In 7-10, use the sample space given in Example...Ch. 9.1 - In 7-10, use the sample space given in Example...Ch. 9.1 - In 7-10, use the sample space given in Example...Ch. 9.1 - In 7-10, use the sample space given in Example...Ch. 9.1 - Suppose that a coin is tossed three times and the...Ch. 9.1 - Suppose that each child born is equally likely to...Ch. 9.1 - Suppose that on a true/false exam you have no idea...Ch. 9.1 - There people have been exposed to a certain...Ch. 9.1 - Prob. 15ESCh. 9.1 - Two faces of a six-sided die are painted red, two...Ch. 9.1 - Prob. 17ESCh. 9.1 - Prob. 18ESCh. 9.1 - An urn contains two blue balls (denoted B1 and B2)...Ch. 9.1 - Relet to Example 9.1.3. Suppose you are appealing...Ch. 9.1 - Prob. 21ESCh. 9.1 - a. How many positive three-digit integers are...Ch. 9.1 - Suppose A[1],A[2],A[3],....,A[n] is a...Ch. 9.1 - Suppose A[1],A[2],...,A[n] is a one-dimensional...Ch. 9.1 - Suppose A[1], A[2],…A[n] is a one-dimensional...Ch. 9.1 - Prob. 26ESCh. 9.1 - What is the 62nd element in the one-dimensional...Ch. 9.1 - If the largest of 56 consecutive integers is 279,...Ch. 9.1 - Prob. 29ESCh. 9.1 - How many even integers are between 1 and 1,.001?Ch. 9.1 - Prob. 31ESCh. 9.1 - A certain non-leap year has 365 days, and January...Ch. 9.1 - Prove Theorem 9.1.1. (Let m be any integer and...Ch. 9.2 - The multiplication rule says that if an operation...Ch. 9.2 - A permutation of a set of elements is_________.Ch. 9.2 - Prob. 3TYCh. 9.2 - Prob. 4TYCh. 9.2 - Prob. 5TYCh. 9.2 - Prob. 6TYCh. 9.2 - Prob. 1ESCh. 9.2 - Prob. 2ESCh. 9.2 - Prob. 3ESCh. 9.2 - Prob. 4ESCh. 9.2 - Prob. 5ESCh. 9.2 - One urn contains two black balls (Labeled B1 and...Ch. 9.2 - One urn contains one blue ball (labeled B1) and...Ch. 9.2 - A person buying a personal computer system is...Ch. 9.2 - Suppose there are three roads from city A to city...Ch. 9.2 - Suppose there are three routes from North Point to...Ch. 9.2 - (a)A bit string is a finite sequence of 0’s and...Ch. 9.2 - Hexadecimal numbers are made using the sixteen...Ch. 9.2 - A coin is tossed four times. Each time the result...Ch. 9.2 - Suppose that in a certain stale, all automobile...Ch. 9.2 - A combination lock requires three selections of...Ch. 9.2 - a. How many integers are there from 10 through 99?...Ch. 9.2 - a. How many integers arc there from 1000 through...Ch. 9.2 - The following diagram shows the keypad for an...Ch. 9.2 - Three officers-a president, a treasurer, and a...Ch. 9.2 - Prob. 20ESCh. 9.2 - Suppose A is a set with m elements and B is a set...Ch. 9.2 - Prob. 22ESCh. 9.2 - In Section 2.5 we showed how integers can be...Ch. 9.2 - In each of 24—28, determine how many times the...Ch. 9.2 - In each of 24-28, determine how many times...Ch. 9.2 - Prob. 26ESCh. 9.2 - Prob. 27ESCh. 9.2 - Prob. 28ESCh. 9.2 - Consider the numbers 1 through 99,999 in their...Ch. 9.2 - Prob. 30ESCh. 9.2 - a. If p is a prime number and a is a positive...Ch. 9.2 - (a) How many ways can the letters of the word...Ch. 9.2 - Six people attend the theater together and sit in...Ch. 9.2 - Prob. 34ESCh. 9.2 - Write all the 2-permutations of {W,X,Y,Z}.Ch. 9.2 - Write all the 3-permutations of {s,t,u,v}.Ch. 9.2 - Evaluate the following quantities. a. P(6,4)b....Ch. 9.2 - a. How many 3-permutations are there of a set of...Ch. 9.2 - a. How many ways can three of the letters of the...Ch. 9.2 - Prove that for every integer n2. P(n+1,3)=n3nCh. 9.2 - Prob. 41ESCh. 9.2 - Prob. 42ESCh. 9.2 - Prob. 43ESCh. 9.2 - Prove Theorem 9.2.1 by mathematical induction.Ch. 9.2 - Prove Theorem 9.2.2 by mathematical induction.Ch. 9.2 - Prob. 46ESCh. 9.2 - Prob. 47ESCh. 9.3 - The addition rule says that if a finite set A...Ch. 9.3 - Prob. 2TYCh. 9.3 - Prob. 3TYCh. 9.3 - Prob. 4TYCh. 9.3 - Prob. 5TYCh. 9.3 - (a) How many bit string consist of from one...Ch. 9.3 - (a) How many string of hexadecimal digits consist...Ch. 9.3 - (a) How many integers from 1 through 999 do not...Ch. 9.3 - How many arrangements in a row of no more than...Ch. 9.3 - (a) How many five-digit integers (integers from...Ch. 9.3 - In a certain stale, all license plain consist of...Ch. 9.3 - At a certain company, passwords must be from...Ch. 9.3 - In a certain country license plates consist of...Ch. 9.3 - a. Consider the following algorithm segment: for...Ch. 9.3 - A calculator has an eight-digit display and a...Ch. 9.3 - a. How many ways can the letters of the word QUICK...Ch. 9.3 - (a) How many ways can the letters of the word...Ch. 9.3 - A group of eight people are attending the movies...Ch. 9.3 - Prob. 14ESCh. 9.3 - Prob. 15ESCh. 9.3 - Prob. 16ESCh. 9.3 - (a) How many string of four hexadecimal digits do...Ch. 9.3 - Prob. 18ESCh. 9.3 - A combination lock requires three selections of...Ch. 9.3 - (a) How many integers from 1 through 100,000...Ch. 9.3 - Prob. 21ESCh. 9.3 - Consider strings of length n over the set {a, b,...Ch. 9.3 - (a) How many integers from 1 through 1,000 are...Ch. 9.3 - (a) How many integers from 1 through 1,000 are...Ch. 9.3 - Prob. 25ESCh. 9.3 - Prob. 26ESCh. 9.3 - For each integer n0 . let akbe the number of bit...Ch. 9.3 - Prob. 28ESCh. 9.3 - Refer to Example 9.3.5. Write the following IP...Ch. 9.3 - A now in a classroom has n seats. Let sn be the...Ch. 9.3 - Assume that birthdays are equally likely to occur...Ch. 9.3 - Assuming that all years have 365 days and all...Ch. 9.3 - A college conducted a survey to explore the...Ch. 9.3 - A study was done to determine the efficacy of...Ch. 9.3 - Prob. 35ESCh. 9.3 - Prob. 36ESCh. 9.3 - Prob. 37ESCh. 9.3 - Prob. 38ESCh. 9.3 - Prob. 39ESCh. 9.3 - Prob. 40ESCh. 9.3 - For 40 and 41, use the definition of the Euler phi...Ch. 9.3 - Prob. 42ESCh. 9.3 - Prob. 43ESCh. 9.3 - Prob. 44ESCh. 9.3 - Prob. 45ESCh. 9.3 - Prob. 46ESCh. 9.3 - Prob. 47ESCh. 9.3 - Prob. 48ESCh. 9.3 - Prob. 49ESCh. 9.4 - The pigeonhole principle states that_______Ch. 9.4 - The generalized pigeonhole principle states that...Ch. 9.4 - If X and Y are finite sets and f is a function...Ch. 9.4 - A small town has only 500 residents. Must there be...Ch. 9.4 - In a group of 700 people, must there be 2 who have...Ch. 9.4 - (a) Given any set of four integers, must there be...Ch. 9.4 - (a) Given any set of seven integers, must there be...Ch. 9.4 - Let S={3,4,5,6,7,8,9,10,11,12} . Suppose six...Ch. 9.4 - Let T={1,2,3,4,5,6,7,8,9}. Suppose five integers...Ch. 9.4 - (a) If seven integers are chosen from between 1...Ch. 9.4 - If n+1 integers are from the set {1,2,3,...2n}....Ch. 9.4 - If n+1 integers are chosen from the set...Ch. 9.4 - Prob. 12ESCh. 9.4 - Suppose six pairs of similar-looking boots are...Ch. 9.4 - Prob. 14ESCh. 9.4 - If n is a positive integer, how many integers from...Ch. 9.4 - How many integer from 1 through 100 must you pick...Ch. 9.4 - Prob. 17ESCh. 9.4 - How many integers must you pick in order to be...Ch. 9.4 - How many integers from 100 through 999 must you...Ch. 9.4 - Prob. 20ESCh. 9.4 - When 683/1493 is written as a decimal what is the...Ch. 9.4 - Prob. 22ESCh. 9.4 - Prob. 23ESCh. 9.4 - Show that within any set of thirteen integers...Ch. 9.4 - Prob. 25ESCh. 9.4 - Prob. 26ESCh. 9.4 - In a group of 2,000 people, must at least 5 have...Ch. 9.4 - A programmer writes 500 lines of computer code in...Ch. 9.4 - A certain collage class has 40 students. All the...Ch. 9.4 - A penny collection contains twelve 1967 pennies,...Ch. 9.4 - A group of 15 exeutives are to share 5 assistants....Ch. 9.4 - Prob. 32ESCh. 9.4 - Prob. 33ESCh. 9.4 - Let S be a set of ten integers chosen from 1...Ch. 9.4 - Prob. 35ESCh. 9.4 - Show that if 101 integers are chosen from 1 to 200...Ch. 9.4 - a. Suppose a1,a2,...,an is a sequence of n...Ch. 9.4 - Prob. 38ESCh. 9.4 - What is the largest number of elements that a set...Ch. 9.4 - Prob. 40ESCh. 9.5 - Prob. 1TYCh. 9.5 - The number of r-combinations of a set of n...Ch. 9.5 - Prob. 3TYCh. 9.5 - Prob. 4TYCh. 9.5 - Prob. 5TYCh. 9.5 - Prob. 1ESCh. 9.5 - Prob. 2ESCh. 9.5 - Prob. 3ESCh. 9.5 - Write an equation relating P(8,3) and (38) .Ch. 9.5 - Use Theorem 9.5.1 to compute each of the...Ch. 9.5 - A student council consists of 15 students. a. In...Ch. 9.5 - A computer programming team has 13 members. a. How...Ch. 9.5 - An instructor gives an exam with fourteen...Ch. 9.5 - A club is cosidering changing its bylaws. In an...Ch. 9.5 - Two new drugs -ire to be tested using a group of...Ch. 9.5 - Refer to Example 9.5.9. For each poker holding...Ch. 9.5 - How many pairs of two distinct integers chosen...Ch. 9.5 - A coin is tossed ten times. In each case the...Ch. 9.5 - (a) How many 16-bit strings contain exactly seven...Ch. 9.5 - (a) How many even integer are in the set...Ch. 9.5 - Suppose that three microchips in a production run...Ch. 9.5 - Ten points Libeled A. B. C. D. E. F. G. H, I. J...Ch. 9.5 - Prob. 18ESCh. 9.5 - (a) How many distinguishable ways can the letters...Ch. 9.5 - a. How man distinguishable ways can the letters...Ch. 9.5 - In Morse code, symbols are represented by...Ch. 9.5 - Each symbol in the Braile code is represented by a...Ch. 9.5 - On an 88 chessboard, a rook is allowed to move any...Ch. 9.5 - The number 42 has the prime factorization 237 ....Ch. 9.5 - a. How many one-of-one functions ant there from a...Ch. 9.5 - a. How many onto functions are there from a set...Ch. 9.5 - Let A be a set with eight elements. How many...Ch. 9.5 - A student council consists of three freshmen, four...Ch. 9.5 - Prob. 29ESCh. 9.5 - Prob. 30ESCh. 9.6 - Given a set X={x1,x1,,xn} , an r-combination with...Ch. 9.6 - Prob. 2TYCh. 9.6 - Prob. 3TYCh. 9.6 - (a) According to Theorem 9.6.1, how many...Ch. 9.6 - (a) According to Theorem 9.6.1, how many multisets...Ch. 9.6 - A bakery produces six different kinds of pastry,...Ch. 9.6 - A camera shop stocks eight different types of...Ch. 9.6 - If n is a positive integer, how many 4-tuples of...Ch. 9.6 - If n is a positive integer, how many 5-tuples of...Ch. 9.6 - Prob. 7ESCh. 9.6 - Prob. 8ESCh. 9.6 - In 8 and 9, how many times will the innermost loop...Ch. 9.6 - Prob. 10ESCh. 9.6 - Prob. 11ESCh. 9.6 - Prob. 12ESCh. 9.6 - In 10-14, find how many solutions there are to the...Ch. 9.6 - In 10-14, find how many solutions there are to the...Ch. 9.6 - Prob. 15ESCh. 9.6 - Consider the situation in Example 9.6.2. a....Ch. 9.6 - a. A store sells 8 colors of balloons with at...Ch. 9.6 - A large pile of coins consists of penruey nickels,...Ch. 9.6 - Suppose the bakery in exercise 3 has at least...Ch. 9.6 - Suppose the camera shop in exercise 4 can obtain...Ch. 9.6 - Prob. 21ESCh. 9.7 - If n and r are nonnegative integers with rn , then...Ch. 9.7 - Prob. 2TYCh. 9.7 - Prob. 3TYCh. 9.7 - Prob. 4TYCh. 9.7 - Prob. 5TYCh. 9.7 - Prob. 6TYCh. 9.7 - Prob. 7TYCh. 9.7 - Prob. 1ESCh. 9.7 - Prob. 2ESCh. 9.7 - Prob. 3ESCh. 9.7 - Prob. 4ESCh. 9.7 - Prob. 5ESCh. 9.7 - Prob. 6ESCh. 9.7 - Prob. 7ESCh. 9.7 - Prob. 8ESCh. 9.7 - Prob. 9ESCh. 9.7 - (a) Use Pascal’s triangle given in Table 9.7.1 to...Ch. 9.7 - Prob. 11ESCh. 9.7 - Use Pascal’s formula repeatedly to derive a...Ch. 9.7 - Use Pascal’s formula to prove by mathematical...Ch. 9.7 - Prob. 14ESCh. 9.7 - Prove the following generalization of exercise 13:...Ch. 9.7 - Prob. 16ESCh. 9.7 - Prove that for every integer n0 ,...Ch. 9.7 - Prob. 18ESCh. 9.7 - Prob. 19ESCh. 9.7 - Prob. 20ESCh. 9.7 - Prob. 21ESCh. 9.7 - Use the binomial theorem to expand the expressions...Ch. 9.7 - Use the binomial theorem to expand the expressions...Ch. 9.7 - Use the binomial theorem to expand the expressions...Ch. 9.7 - Prob. 25ESCh. 9.7 - Prob. 26ESCh. 9.7 - Prob. 27ESCh. 9.7 - Prob. 28ESCh. 9.7 - Prob. 29ESCh. 9.7 - Prob. 30ESCh. 9.7 - In 29-34, find the coefficient of the given term...Ch. 9.7 - In 29-34, find the coefficient of the given term...Ch. 9.7 - Prob. 33ESCh. 9.7 - In 29-34, find the coefficient of the given term...Ch. 9.7 - Prob. 35ESCh. 9.7 - For every integer n1 ,...Ch. 9.7 - Prob. 37ESCh. 9.7 - Prob. 38ESCh. 9.7 - Prob. 39ESCh. 9.7 - Prob. 40ESCh. 9.7 - Prob. 41ESCh. 9.7 - Prob. 42ESCh. 9.7 - Prob. 43ESCh. 9.7 - Prob. 44ESCh. 9.7 - Prob. 45ESCh. 9.7 - Prob. 46ESCh. 9.7 - Prob. 47ESCh. 9.7 - Prob. 48ESCh. 9.7 - Prob. 49ESCh. 9.7 - Prob. 50ESCh. 9.7 - Express each of the sums in 43—54 in closed form...Ch. 9.7 - Prob. 52ESCh. 9.7 - Prob. 53ESCh. 9.7 - Prob. 54ESCh. 9.7 - Prob. 55ESCh. 9.8 - If A is an event in a sample space S,P(A) can...Ch. 9.8 - Prob. 2TYCh. 9.8 - Prob. 3TYCh. 9.8 - Prob. 4TYCh. 9.8 - Prob. 5TYCh. 9.8 - Prob. 1ESCh. 9.8 - Prob. 2ESCh. 9.8 - Prob. 3ESCh. 9.8 - Prob. 4ESCh. 9.8 - Prob. 5ESCh. 9.8 - Prob. 6ESCh. 9.8 - Prob. 7ESCh. 9.8 - Prob. 8ESCh. 9.8 - Let A and B be events in a sample space S, and let...Ch. 9.8 - Prob. 10ESCh. 9.8 - Prob. 11ESCh. 9.8 - Prob. 12ESCh. 9.8 - Prob. 13ESCh. 9.8 - A lottery game offers $2 million to the grand...Ch. 9.8 - A company offers a raffle whose grand prize is a...Ch. 9.8 - An urn contains four balls numbered 2, 2, 5, and...Ch. 9.8 - Prob. 17ESCh. 9.8 - An urn contains five balls numbered 1,2,2,8, and...Ch. 9.8 - Prob. 19ESCh. 9.8 - Suppose a person offers to play a game with you....Ch. 9.8 - Prob. 21ESCh. 9.8 - Prob. 22ESCh. 9.8 - Prob. 23ESCh. 9.9 - Prob. 1TYCh. 9.9 - Prob. 2TYCh. 9.9 - Prob. 3TYCh. 9.9 - Prob. 4TYCh. 9.9 - Prob. 1ESCh. 9.9 - Prob. 2ESCh. 9.9 - Prob. 3ESCh. 9.9 - Prob. 4ESCh. 9.9 - Suppose that A and B are events in a sample space...Ch. 9.9 - An urn contains 25 red balls and 15 blue balls....Ch. 9.9 - Prob. 7ESCh. 9.9 - A pool of 10 semifinalists for a job consists of 7...Ch. 9.9 - Prob. 9ESCh. 9.9 - Prob. 10ESCh. 9.9 - One urn contains 12 blue balls and 7 white balls,...Ch. 9.9 - Redo exercise 11 assuming that the first urn...Ch. 9.9 - Prob. 13ESCh. 9.9 - Prob. 14ESCh. 9.9 - Prob. 15ESCh. 9.9 - Three different supplier.-X, Y. and Z-provide...Ch. 9.9 - Prob. 17ESCh. 9.9 - Prob. 18ESCh. 9.9 - Prob. 19ESCh. 9.9 - Prob. 20ESCh. 9.9 - Prob. 21ESCh. 9.9 - Prob. 22ESCh. 9.9 - Prob. 23ESCh. 9.9 - Prob. 24ESCh. 9.9 - A coin is loaded so that the probability of heads...Ch. 9.9 - Describe a sample space and events A,B, and C,...Ch. 9.9 - Prob. 27ESCh. 9.9 - Prob. 28ESCh. 9.9 - Suppose that ten items are chosen at random from a...Ch. 9.9 - Suppose the probability of a false positive result...Ch. 9.9 - Prob. 31ESCh. 9.9 - Prob. 32ESCh. 9.9 - Prob. 33ESCh. 9.9 - Prob. 34ES
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