Math in Our World
3rd Edition
ISBN: 9780073519678
Author: David Sobecki Professor, Allan G. Bluman
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 15.2, Problem 6E
To determine
To explain: At least two different ways that 12 in the 12-hour clock system acts like zero in the real number system.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Can you tell the answer
ce-
216
Answer the following, using the figures and
tables from the age versus bone loss data in
2010 Questions 2 and 12:
a. For what ages is it reasonable to use the
regression line to predict bone loss?
b. Interpret the slope in the context of this
wolf X
problem.
y
min ball bas
oft
c. Using the data from the study, can you
say that age causes bone loss?
srls to sqota bri
vo X 1931s
aqsini-Y ST.0 0 Isups
Iq nsalst ever tom vam noboslios tsb
a ti segood insvla villemari
aixs-Yedi
120
110
110
100
90
80
Total Score
Scatterplot of Total Score vs. Putts
grit
bas
70-
20
25
30
35
40
45
50
Putts
Chapter 15 Solutions
Math in Our World
Ch. 15.1 - Use Table 15-1 to find the result of each...Ch. 15.1 - Which properties does the following system...Ch. 15.1 - Prob. 3TTOCh. 15.1 - Prob. 4TTOCh. 15.1 - Prob. 1ECh. 15.1 - Prob. 2ECh. 15.1 - Prob. 3ECh. 15.1 - Prob. 4ECh. 15.1 - Prob. 5ECh. 15.1 - Prob. 6E
Ch. 15.1 - Prob. 7ECh. 15.1 - Prob. 8ECh. 15.1 - Prob. 9ECh. 15.1 - Prob. 10ECh. 15.1 - Prob. 11ECh. 15.1 - Prob. 12ECh. 15.1 - For Exercises 724, use the elements C, D, E, and...Ch. 15.1 - For Exercises 724, use the elements C, D, E, and...Ch. 15.1 - For Exercises 724, use the elements C, D, E, and...Ch. 15.1 - For Exercises 724, use the elements C, D, E, and...Ch. 15.1 - For Exercises 724, use the elements C, D, E, and...Ch. 15.1 - For Exercises 724, use the elements C, D, E, and...Ch. 15.1 - Prob. 19ECh. 15.1 - Prob. 20ECh. 15.1 - For Exercises 724, use the elements C, D, E, and...Ch. 15.1 - Prob. 22ECh. 15.1 - Prob. 23ECh. 15.1 - Prob. 24ECh. 15.1 - Prob. 25ECh. 15.1 - Prob. 26ECh. 15.1 - Prob. 27ECh. 15.1 - Prob. 28ECh. 15.1 - Prob. 29ECh. 15.1 - For Exercises 2540, use the elements and the...Ch. 15.1 - Prob. 31ECh. 15.1 - Prob. 32ECh. 15.1 - For Exercises 2540, use the elements and the...Ch. 15.1 - For Exercises 2540, use the elements and the...Ch. 15.1 - For Exercises 2540, use the elements and the...Ch. 15.1 - Prob. 36ECh. 15.1 - Prob. 37ECh. 15.1 - Prob. 38ECh. 15.1 - For Exercises 2540, use the elements and the...Ch. 15.1 - Prob. 40ECh. 15.1 - Prob. 41ECh. 15.1 - Prob. 42ECh. 15.1 - Prob. 43ECh. 15.1 - Prob. 44ECh. 15.1 - Prob. 45ECh. 15.1 - Prob. 46ECh. 15.1 - Prob. 47ECh. 15.1 - For Exercises 4150, determine which properties the...Ch. 15.1 - Prob. 49ECh. 15.1 - Prob. 50ECh. 15.1 - Prob. 51ECh. 15.1 - Prob. 52ECh. 15.1 - Prob. 53ECh. 15.1 - Prob. 54ECh. 15.1 - Prob. 55ECh. 15.1 - Prob. 56ECh. 15.1 - For exercises 5160, determine whether the given...Ch. 15.1 - Prob. 58ECh. 15.1 - For exercises 5160, determine whether the given...Ch. 15.1 - Prob. 60ECh. 15.1 - Exercises 6166 use the mathematical system...Ch. 15.1 - Prob. 62ECh. 15.1 - Prob. 63ECh. 15.1 - Prob. 64ECh. 15.1 - Prob. 65ECh. 15.1 - Prob. 66ECh. 15.1 - Prob. 67ECh. 15.1 - Prob. 68ECh. 15.1 - Prob. 69ECh. 15.1 - Prob. 70ECh. 15.1 - Prob. 71ECh. 15.1 - Prob. 72ECh. 15.1 - Prob. 73ECh. 15.1 - Prob. 74ECh. 15.1 - Prob. 75ECh. 15.1 - Prob. 76ECh. 15.1 - Prob. 77ECh. 15.1 - Prob. 78ECh. 15.1 - Prob. 79ECh. 15.1 - Prob. 80ECh. 15.1 - Prob. 81ECh. 15.1 - Prob. 82ECh. 15.1 - Exercises 8184 are based on the classic game of...Ch. 15.1 - Exercises 8184 are based on the classic game of...Ch. 15.1 - Suppose that a mathematical system consists of the...Ch. 15.2 - Using the 12-hour clock, find these sums. (a)3+12...Ch. 15.2 - Prob. 2TTOCh. 15.2 - Prob. 3TTOCh. 15.2 - Prob. 4TTOCh. 15.2 - Prob. 1ECh. 15.2 - Prob. 2ECh. 15.2 - Prob. 3ECh. 15.2 - Prob. 4ECh. 15.2 - Prob. 5ECh. 15.2 - Prob. 6ECh. 15.2 - Prob. 7ECh. 15.2 - Prob. 8ECh. 15.2 - Prob. 9ECh. 15.2 - Prob. 10ECh. 15.2 - Prob. 11ECh. 15.2 - Prob. 12ECh. 15.2 - Prob. 13ECh. 15.2 - Prob. 14ECh. 15.2 - Prob. 15ECh. 15.2 - Prob. 16ECh. 15.2 - For Exercises 920, find the equivalent number on...Ch. 15.2 - For Exercises 920, find the equivalent number on...Ch. 15.2 - Prob. 19ECh. 15.2 - Prob. 20ECh. 15.2 - For Exercises 2130, perform the additions on the...Ch. 15.2 - Prob. 22ECh. 15.2 - For Exercises 2130, perform the additions on the...Ch. 15.2 - Prob. 24ECh. 15.2 - For Exercises 2130, perform the additions on the...Ch. 15.2 - Prob. 26ECh. 15.2 - For Exercises 2130, perform the additions on the...Ch. 15.2 - Prob. 28ECh. 15.2 - For Exercises 2130, perform the additions on the...Ch. 15.2 - Prob. 30ECh. 15.2 - For Exercises 3140, perform the subtractions on...Ch. 15.2 - Prob. 32ECh. 15.2 - For Exercises 3140, perform the subtractions on...Ch. 15.2 - Prob. 34ECh. 15.2 - For Exercises 3140, perform the subtractions on...Ch. 15.2 - Prob. 36ECh. 15.2 - For Exercises 3140, perform the subtractions on...Ch. 15.2 - Prob. 38ECh. 15.2 - For Exercises 3140, perform the subtractions on...Ch. 15.2 - Prob. 40ECh. 15.2 - For Exercises 4150, perform the multiplications on...Ch. 15.2 - Prob. 42ECh. 15.2 - For Exercises 4150, perform the multiplications on...Ch. 15.2 - Prob. 44ECh. 15.2 - For Exercises 4150, perform the multiplications on...Ch. 15.2 - Prob. 46ECh. 15.2 - For Exercises 4150, perform the multiplications on...Ch. 15.2 - Prob. 48ECh. 15.2 - For Exercises 4150, perform the multiplications on...Ch. 15.2 - Prob. 50ECh. 15.2 - In Exercises 5162, perform the indicated operation...Ch. 15.2 - Prob. 52ECh. 15.2 - In Exercises 5162, perform the indicated operation...Ch. 15.2 - Prob. 54ECh. 15.2 - In Exercises 5162, perform the indicated operation...Ch. 15.2 - Prob. 56ECh. 15.2 - Prob. 57ECh. 15.2 - Prob. 58ECh. 15.2 - Prob. 59ECh. 15.2 - Prob. 60ECh. 15.2 - In Exercises 5162, perform the indicated operation...Ch. 15.2 - Prob. 62ECh. 15.2 - For Exercises 6370, find the additive inverse for...Ch. 15.2 - Prob. 64ECh. 15.2 - Prob. 65ECh. 15.2 - Prob. 66ECh. 15.2 - Prob. 67ECh. 15.2 - For Exercises 6370, find the additive inverse for...Ch. 15.2 - Prob. 69ECh. 15.2 - For Exercises 6370, find the additive inverse for...Ch. 15.2 - For Exercises 7176, find the multiplicative...Ch. 15.2 - Prob. 72ECh. 15.2 - For Exercises 7176, find the multiplicative...Ch. 15.2 - Prob. 74ECh. 15.2 - Prob. 75ECh. 15.2 - Prob. 76ECh. 15.2 - Prob. 77ECh. 15.2 - Prob. 78ECh. 15.2 - Prob. 79ECh. 15.2 - Prob. 80ECh. 15.2 - Prob. 81ECh. 15.2 - Prob. 82ECh. 15.2 - Prob. 83ECh. 15.2 - Prob. 84ECh. 15.2 - Prob. 85ECh. 15.2 - Prob. 86ECh. 15.2 - Prob. 87ECh. 15.2 - Prob. 88ECh. 15.2 - For Exercises 8190, find the value of y using the...Ch. 15.2 - Prob. 90ECh. 15.2 - Prob. 91ECh. 15.2 - Prob. 92ECh. 15.2 - Prob. 93ECh. 15.2 - Prob. 94ECh. 15.2 - Prob. 95ECh. 15.2 - Prob. 96ECh. 15.2 - Prob. 97ECh. 15.2 - Prob. 98ECh. 15.2 - Prob. 99ECh. 15.2 - Prob. 100ECh. 15.2 - Prob. 101ECh. 15.2 - Prob. 102ECh. 15.2 - Prob. 103ECh. 15.2 - Prob. 104ECh. 15.2 - Prob. 105ECh. 15.2 - Prob. 106ECh. 15.2 - Prob. 107ECh. 15.2 - Prob. 108ECh. 15.2 - Prob. 109ECh. 15.2 - Prob. 110ECh. 15.2 - Prob. 111ECh. 15.2 - Prob. 112ECh. 15.2 - Prob. 113ECh. 15.2 - Prob. 114ECh. 15.2 - Prob. 115ECh. 15.2 - Prob. 116ECh. 15.2 - Prob. 117ECh. 15.2 - Prob. 118ECh. 15.2 - Prob. 119ECh. 15.2 - Prob. 120ECh. 15.2 - Prob. 121ECh. 15.3 - Prob. 1TTOCh. 15.3 - Prob. 2TTOCh. 15.3 - Prob. 3TTOCh. 15.3 - Prob. 4TTOCh. 15.3 - Prob. 5TTOCh. 15.3 - Find all natural number solutions to 4x 24 mod 8.Ch. 15.3 - Prob. 1ECh. 15.3 - Prob. 2ECh. 15.3 - Prob. 3ECh. 15.3 - Prob. 4ECh. 15.3 - Prob. 5ECh. 15.3 - Prob. 6ECh. 15.3 - Prob. 7ECh. 15.3 - Prob. 8ECh. 15.3 - Prob. 9ECh. 15.3 - Prob. 10ECh. 15.3 - For Exercises 516, find the values of each number...Ch. 15.3 - For Exercises 516, find the values of each number...Ch. 15.3 - Prob. 13ECh. 15.3 - Prob. 14ECh. 15.3 - Prob. 15ECh. 15.3 - Prob. 16ECh. 15.3 - Prob. 17ECh. 15.3 - Prob. 18ECh. 15.3 - Prob. 19ECh. 15.3 - Prob. 20ECh. 15.3 - Prob. 21ECh. 15.3 - For Exercises 1746, perform the following...Ch. 15.3 - Prob. 23ECh. 15.3 - Prob. 24ECh. 15.3 - Prob. 25ECh. 15.3 - Prob. 26ECh. 15.3 - Prob. 27ECh. 15.3 - Prob. 28ECh. 15.3 - Prob. 29ECh. 15.3 - Prob. 30ECh. 15.3 - Prob. 31ECh. 15.3 - Prob. 32ECh. 15.3 - Prob. 33ECh. 15.3 - Prob. 34ECh. 15.3 - For Exercises 1746, perform the following...Ch. 15.3 - Prob. 36ECh. 15.3 - Prob. 37ECh. 15.3 - For Exercises 1746, perform the following...Ch. 15.3 - Prob. 39ECh. 15.3 - Prob. 40ECh. 15.3 - Prob. 41ECh. 15.3 - Prob. 42ECh. 15.3 - Prob. 43ECh. 15.3 - Prob. 44ECh. 15.3 - Prob. 45ECh. 15.3 - Prob. 46ECh. 15.3 - Prob. 47ECh. 15.3 - Prob. 48ECh. 15.3 - Prob. 49ECh. 15.3 - Prob. 50ECh. 15.3 - Prob. 51ECh. 15.3 - Prob. 52ECh. 15.3 - Prob. 53ECh. 15.3 - For Exercises 4754, find all natural number...Ch. 15.3 - Prob. 55ECh. 15.3 - Prob. 56ECh. 15.3 - Prob. 57ECh. 15.3 - Prob. 58ECh. 15.3 - Prob. 59ECh. 15.3 - Prob. 60ECh. 15.3 - Prob. 61ECh. 15.3 - Prob. 62ECh. 15.3 - Prob. 63ECh. 15.3 - Prob. 64ECh. 15.3 - Prob. 65ECh. 15.3 - Prob. 66ECh. 15.3 - Prob. 67ECh. 15.3 - Prob. 68ECh. 15.3 - Prob. 69ECh. 15.3 - Prob. 70ECh. 15.3 - Prob. 71ECh. 15.3 - Prob. 72ECh. 15.3 - Prob. 73ECh. 15.3 - Prob. 74ECh. 15.3 - Prob. 75ECh. 15.3 - Prob. 76ECh. 15.3 - Prob. 77ECh. 15.3 - Prob. 78ECh. 15.3 - Prob. 79ECh. 15.3 - Prob. 80ECh. 15.3 - Prob. 81ECh. 15.3 - Write a congruence that solves each conversion...Ch. 15.3 - Prob. 83ECh. 15.3 - Prob. 85ECh. 15.3 - Prob. 86ECh. 15.3 - Prob. 87ECh. 15.3 - Prob. 88ECh. 15.3 - Prob. 89ECh. 15.3 - Consider the congruence x2 4 mod 5. (a)Check that...Ch. 15.3 - Prob. 91ECh. 15.3 - For each congruence, find all possible values for...Ch. 15 - For Exercises 111, use the elements A, B, C and...Ch. 15 - Prob. 2RECh. 15 - For Exercises 111, use the elements A, B, C and...Ch. 15 - Prob. 4RECh. 15 - Prob. 5RECh. 15 - Prob. 6RECh. 15 - Prob. 7RECh. 15 - Prob. 8RECh. 15 - Prob. 9RECh. 15 - Prob. 10RECh. 15 - Prob. 11RECh. 15 - Prob. 12RECh. 15 - For Exercises 1216, determine if the given system...Ch. 15 - Prob. 14RECh. 15 - Prob. 15RECh. 15 - Prob. 16RECh. 15 - Prob. 17RECh. 15 - Prob. 18RECh. 15 - Prob. 19RECh. 15 - Prob. 20RECh. 15 - Prob. 21RECh. 15 - Prob. 22RECh. 15 - For Exercises 2328, perform the indicated...Ch. 15 - Prob. 24RECh. 15 - Prob. 25RECh. 15 - Prob. 26RECh. 15 - Prob. 27RECh. 15 - Prob. 28RECh. 15 - Prob. 29RECh. 15 - Prob. 30RECh. 15 - Prob. 31RECh. 15 - Prob. 32RECh. 15 - Prob. 33RECh. 15 - Prob. 34RECh. 15 - For Exercises 3142, find the equivalent number for...Ch. 15 - Prob. 36RECh. 15 - Prob. 37RECh. 15 - Prob. 38RECh. 15 - Prob. 39RECh. 15 - Prob. 40RECh. 15 - Prob. 41RECh. 15 - Prob. 42RECh. 15 - Prob. 43RECh. 15 - Prob. 44RECh. 15 - Prob. 45RECh. 15 - Prob. 46RECh. 15 - Prob. 47RECh. 15 - Prob. 48RECh. 15 - Prob. 49RECh. 15 - Prob. 50RECh. 15 - Prob. 51RECh. 15 - Prob. 52RECh. 15 - Prob. 53RECh. 15 - Prob. 54RECh. 15 - Prob. 55RECh. 15 - Prob. 56RECh. 15 - Prob. 57RECh. 15 - Prob. 58RECh. 15 - Prob. 59RECh. 15 - Prob. 60RECh. 15 - Prob. 61RECh. 15 - Prob. 62RECh. 15 - Prob. 63RECh. 15 - Prob. 64RECh. 15 - Prob. 65RECh. 15 - Prob. 66RECh. 15 - Prob. 1CTCh. 15 - Prob. 2CTCh. 15 - Prob. 3CTCh. 15 - Prob. 4CTCh. 15 - Prob. 5CTCh. 15 - Prob. 6CTCh. 15 - Prob. 7CTCh. 15 - Prob. 8CTCh. 15 - Prob. 9CTCh. 15 - Prob. 10CTCh. 15 - Prob. 11CTCh. 15 - Prob. 12CTCh. 15 - Prob. 13CTCh. 15 - Prob. 14CTCh. 15 - Prob. 15CTCh. 15 - Prob. 16CTCh. 15 - Prob. 17CTCh. 15 - Prob. 18CTCh. 15 - Prob. 19CTCh. 15 - Prob. 20CTCh. 15 - Prob. 21CTCh. 15 - Prob. 22CTCh. 15 - Prob. 23CTCh. 15 - Prob. 24CTCh. 15 - An entire baseball league is signed up for an...Ch. 15 - Prob. 26CT
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.Similar questions
- 10 15 Answer the following, using the figures and tables from the temperature versus coffee sales data from Questions 1 and 11: a. How many coffees should the manager prepare to make if the temperature is 32°F? b. As the temperature drops, how much more coffee will consumers purchase?ov (Hint: Use the slope.) 21 bru sug c. For what temperature values does the voy marw regression line make the best predictions? al X al 1090391-Yrit,vewolf 30-X Inlog arts bauoxs 268 PART 4 Statistical Studies and the Hunt forarrow_forward18 Using the results from the rainfall versus corn production data in Question 14, answer DOV 15 the following: a. Find and interpret the slope in the con- text of this problem. 79 b. Find the Y-intercept in the context of this problem. alb to sig c. Can the Y-intercept be interpreted here? (.ob or grinisiques xs as 101 gniwollol edt 958 orb sz) asiques sich ed: flow wo PEMAIarrow_forwardLet U = = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} be the universal set. Use the following subsets of U to determine if each statement is true or false. A = {0, 1, 3, 5} and B = {2, 3, 4, 5,9} • true AUB = {3,5} • true A - B = {0, 1} ⚫ true B = {0, 1, 6, 7, 8, 10} ⚫ true An Bc • true (AUB) = {0,1} = {0, 1, 2, 4, 6, 7, 8, 9, 10} ⚫ true A x B = {(0,2), (1, 3), (3, 4), (5,5)}arrow_forward
- Let A = {x Z | x=0 (mod 6)} and B = {x = Z | x = 0 (mod 9)}. Which of the following sentences describes the set relationship between A and B ? *Keep in mind that Ç means proper subset. AÇ B BÇA A = B AnB = 0 none of thesearrow_forwardLet U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} be the universal set. Let A = {0, 1, 2, 3, 9} and B = {2, 3, 4, 5, 6}. Select all elements in An B. 2 3 4 5 18 7 8 9 ☐ 10arrow_forwardLet U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} be the universal set. Let A = {0, 1, 2, 3, 9} and B = {2, 3, 4, 5, 6}. Select all elements in An B. 1 2 ✓ 3 + 5 10 7 > 00 ☐ 10arrow_forward
- Variable Total score (Y) Putts hit (X) Mean. 93.900 35.780 Standard Deviation 7.717 4.554 Correlation 0.896arrow_forward17 Referring to the figures and tables from the golf data in Questions 3 and 13, what hap- pens as you keep increasing X? Does Y increase forever? Explain. comis word ே om zol 6 svari woy wol visy alto su and vibed si s'ablow it bas akiog vino b tad) beil Bopara Aon csu How wod griz -do 30 義arrow_forwardVariable Temperature (X) Coffees sold (Y) Mean 35.08 29,913 Standard Deviation 16.29 12,174 Correlation -0.741arrow_forward
- 13 A golf analyst measures the total score and number of putts hit for 100 rounds of golf an amateur plays; you can see the summary of statistics in the following table. (See the figure in Question 3 for a scatterplot of this data.)noitoloqpics bella a. Is it reasonable to use a line to fit this data? Explain. 101 250 b. Find the equation of the best fitting 15er regression line. ad aufstuess som 'moob Y lo esulav in X ni ognado a tad Variable on Mean Standard Correlation 92 Deviation Total score (Y) 93.900 7.717 0.896 Putts hit (X) 35.780 4.554 totenololbenq axlam riso voy X to asulisy datdw gribol anil er 08,080.0 zl noitsism.A How atharrow_forwardVariable Bone loss (Y) Age (X) Mean 35.008. 67.992 Standard Deviation 7.684 10.673 Correlation 0.574arrow_forward50 Bone Loss 30 40 20 Scatterplot of Bone Loss vs. Age . [902) 10 50 60 70 80 90 Age a sub adi u xinq (20) E 4 adw I- nyd med ivia .0 What does a scatterplot that shows no linear relationship between X and Y look like?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal Littell
College AlgebraAlgebraISBN:9781305115545Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage Learning
Elementary AlgebraAlgebraISBN:9780998625713Author:Lynn Marecek, MaryAnne Anthony-SmithPublisher:OpenStax - Rice University
College Algebra (MindTap Course List)
Algebra
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning
Holt Mcdougal Larson Pre-algebra: Student Edition...
Algebra
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Algebra: Structure And Method, Book 1
Algebra
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:McDougal Littell
College Algebra
Algebra
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:Cengage Learning
Elementary Algebra
Algebra
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:OpenStax - Rice University
Find number of persons in a part with 66 handshakes Combinations; Author: Anil Kumar;https://www.youtube.com/watch?v=33TgLi-wp3E;License: Standard YouTube License, CC-BY
Discrete Math 6.3.1 Permutations and Combinations; Author: Kimberly Brehm;https://www.youtube.com/watch?v=J1m9sB5XZQc;License: Standard YouTube License, CC-BY
How to use permutations and combinations; Author: Mario's Math Tutoring;https://www.youtube.com/watch?v=NEGxh_D7yKU;License: Standard YouTube License, CC-BY
Permutations and Combinations | Counting | Don't Memorise; Author: Don't Memorise;https://www.youtube.com/watch?v=0NAASclUm4k;License: Standard Youtube License
Permutations and Combinations Tutorial; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=XJnIdRXUi7A;License: Standard YouTube License, CC-BY