Math 141

Offfice hours (held in TBD):
Tuesday, 9/9: TBD    Thursday, 9/11: TBD
Tuesday, 9/16: TBD    Thursday, 9/18: TBD

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These dates are tentative and subject to change, including for exams.

Textbook Chapter 1    Syllabus    Main ideas    Exam solutions    Technology    Do Good Sheet    $5 Challenge

Homework solutions:    Chapter 1    Chapter 2    Chapter 3    Chapter 4    Chapter 5   


Day Date Before class, read book and watch video clips: During/after class Possible quiz problems
at our next class meeting
(or similar problems)
Section Video clips (length) Supplements Handouts
To review on
your own before
coming to London
Derivatives
  x^n   (3:53)
  x^5 + 2x^3 - x^2   (6:38)
  2/x^3 - 1/x^2   (4:48)
  5x^(1/4) + 7   (2:35)
  6/x^2, plus second derivative   (2:26)
  e^x, ln(x) (from 1:05)   (3:42)
  (2x^3 + 5x^2 - 7)^8   (5:30)
  ln(sqrt(x))   (6:44)
  sqrt(3x^2 - x)   (5:30)
  (5 - 3x)/(x^2 + 3x)   (6:43)
  (x^3 + 4x^2 + 7)^(1/4)   (5:54)

Misc. topics
  Exponents   (9:22)
  Logarithms 1   (7:01)
  Logarithms 2   (4:19)
  Estimating derivatives   (6:41)
  Slope of secant line   (7:16)
  A function and its derivative   (5:04)

Optimization problems
  Box problem part 1   (9:49)
  Box problem part 2   (8:59)
  Profit at shoe factory   (11:56)
  Cost of materials   (12:39)

Algebra review
Derivative rules
Derivative calculator
Detailed review of Calculus
Calculus Review Textbook
and Homework Problems

Section Calc 3.1, Page 181
18, 19, 23, 24, 45, 46, 48

Section Calc 3.2, Page 188
5, 6, 15, 16, 23, 24

Section Calc 3.4, Page 205
8, 9, 19, 20, 23, 40

Section Calc 3.7, Page 226
2, 7, 8, 11, 12

Section Calc 4.2, Page 268
41, 45, 47, 48, 50, 51

Section Calc 4.6, Page 305
5, 6, 11, 12, 35

3.1, 3.2, 3.4 Solutions
3.7, 4.2 Solutions
4.6 Solutions

Mon 9/8 Calculus
Review
1.1 Multivariable functions   (7:05)
Contour plots   (5:35)
3D function plotter
Desmos 3D function plotter
Figure 1.1.5
Contour plots
Production plot 1
Production plot 2
Section 1.1
4, 7 - 12, 22 - 26
Wed 9/10 1.2 Partial derivatives 1   (7:12)
Partial derivatives 2   (5:19)
Partial derivatives 3   (7:03)
Way more practice   (35:27)
Derivative calculator   (change "Diff'n variable" in Options)
Partial derivatives in Wolfram Alpha
Section 1.2
1, 2, 5, 6, 9, 10, 16, 17
23, 24, 26 - 28, 32, 33
1.3
Day 1
Optimization 1   (6:24)
Optimization 2   (10:05)
Optimization 3   (11:22)
Second derivative test
Minimum and saddle point example
Section 1.3
3, 5 - 7, 11, 17, 19 - 21, 23 - 25
Mon 9/15 1.3
Day 2
Section 1.3
29 - 31, 35 - 37, 41 - 43, 47 - 51
1.4
Day 1
More cowbell ('cause why not?)  (5:42) Section 1.4
1 - 3, 7 - 17
Wed 9/17 1.4
Day 2
Section 1.4
18, 19, 21, 22, 26 - 29, 31 - 34
1.5 Introduction to least squares   (4:48)
More details   (22:17)
Origins of Least Squares: Gauss
Least squares
Covid: hospitalizations vs. vaccinations
Covid: schools open vs. deaths
Section 1.5
9, 11 - 15
Mon 9/29 Insights End of Chapter 1 Review
Review
Wed 10/1 Exam 1
2.1 G-J Elimination: One Solution   (13:28) Coins activity
Gauss-Jordan Elimination Example
Gauss-Jordan Elimination Website
Another Gauss-Jordan Elimination Website
Don't give up, keep trying
Mon 10/6 2.1, 2.2 Infinite solutions (through 12:40)   (12:40) 
No solution   (12:07)
Results of Gauss-Jordan elimination Section 2.1
7, 8, 23, 37, 47, 48, 59, 60
61 - 68, 73, 74, 76
2.2 My brain is full Section 2.2
17, 20, 22, 23, 27, 28,
37 - 45, 49 - 54
Wed 10/8 2.3 Why matrices   (5:42)
Matrix multiplication   (5:28)
Matrix multiplication in Wolf. Alpha Section 2.3
25, 27 - 36, 41, 42, 47
50 - 52, 54, 55, 58, 59
2.4 Matrix inverses   (14:14)
Use Matrix inverse to solve Ax = b   (6:39)
Matrix inverse in Wolfram Alpha Section 2.4
1, 2, 12, 13, 20, 21
27, 28, 30, 32 - 34
Mon 10/13 2.5 Larger matrix inverses (start at :40) (6:21) Derivation of 2 x 2 inverse formula
3 x 3 inverse formula
4 x 4 matrix determinant
Section 2.5
6, 7, 11, 14, 15, 17, 19, 20
21 - 24
2.6 2 x 2 Input-Output Example
3 x 3 Input-Output Example in Excel
Section 2.6
1, 2, 11 - 13, 25 - 27, 29, 30
Tue 10/14 Insights End of Chapter 2 Review
Review
Wed 10/15 Exam 2
3.1

3.2
Sets, unions, intersections   (7:43)
Subsets   (4:31)
Venn diagrams   (6:22)
De Morgan's Laws   (1:48)
3.1
3.2
4.1
Section 3.1
3 - 5, 13, 14, 50, 54
Section 3.2
1 - 4, 13, 14, 33 - 36, 43, 44, 49, 50
Mon 10/20 3.4 Introduction to counting   (2:34)
Permutations: the formula   (7:34)
Permutations: three letter words   (5:38)

3.4
Section 3.4
7 - 16, 23 - 28, 37 - 48,
51, 52, 55, 58, 63
3.5 Combinations: the formula   (11:16)
Combinations: hand shakes   (7:28)
3.5, 3.6 Section 3.5
28, 30, 32, 34, 36, 38, 39, 47,
48, 56, 59, 60, 63, 64, 66, 67
Wed 10/22 3.6 More counting problems   (12:55)
One more   (2:37)
3.5, 3.6 Section 3.6
1 - 7, 9 - 15, 21 - 24
4.2 Additional rule   (10:42)
Venn diagrams   (6:22)
4.2 Section 4.2
10, 11, 15, 16, 19, 20, 29,
30, 33 - 36, 37 - 40
(due Friday)
Mon 11/3 Math in Poker
Insights
Texas Hold 'Em   (5:04) Poker hands
Gambling is bad
Sports gambling can be addictive
End of Chapter 3 Review
Review Concert ticket QR code
Starbucks counting problems
Wed 11/5 Exam 3
4.3 Birthday paradox simulator
Birthday match probabilities
March 2024 Powerball lottery
Are lotteries really random?
Lotteries prey on the poor
When to buy a lottery ticket (if you must)
Gaming the lottery
4.3 Section 4.3
1 - 4, 7 - 10, 13 - 16,
21 - 28, 33 - 36, 39 - 42
Mon 11/10 4.4 Conditional probability   (6:43)
Compound probability of independent events   (6:00)
Free throws vs. three pointers   (5:46)
4.4 Section 4.4
1 - 10, 15, 16, 19,
20, 23 - 26
4.4 Can't stop gambling   (4:57) 4.4 Section 4.4
29, 30, 33 - 42, 47 - 52
55, 59 - 62
Wed 11/12 4.5 Tree diagrams   (10:43) Tennis serve spreadsheet
Tennis serves
4.5 Section 4.5
2, 3, 7, 9, 11, 13, 15,
16, 21 - 26, 28, 36
4.6 Bayes' Theorem   (5:05) Medical testing spreadsheet
NY Times article on mammograms
LA Times article on mammograms
Study on mammography in older women
4.6 Section 4.6
1 - 8, 18, 22 - 24
Mon 11/17 Insights Math can be difficult   (2:10) Sicherman Dice End of Chapter 4 Review
Review
Wed 11/19 Exam 4
5.1
5.2
Histograms, bar charts   (1:38)
Various plots (7:34)
Probability distribution (6:47)
Visualizing data: NY Times COVID tracking
(Possibly) surprising statistics: what would you have guessed?
   Medical error deaths
   Fatal police shootings
   Undocumented immigrants
   Tax rates of the rich
5.2 Section 5.2
4 - 10, 17, 19, 20, 27, 28
Mon 11/24 5.3 Binomial Trials   (10:23) Binomial distributions
Ten free throws
HW 5.3.50
5.3 Section 5.3
5 - 16, 27, 41, 42,
46, 49, 50, 51, 53, 55abc
5.4 Expected value, mean   (4:31) Flip a coin. Again! 5.4 Section 5.4
1, 2, 5 - 10, 13 - 15, 21,
27 - 29, 30, 33 - 36, 43 - 44
Wed 11/26 5.5 Variance, standard deviation   (6:25) Volatility in stock markets
Means and standard deviations
5.5 Section 5.5
1 - 12
5.6 Normal and other distributions   (10:52)
Empirical rulex   (10:24)
Z-scores   (5:56)
Derivation of the Normal Curve Function:
   Irish version
   American version
5.6 Section 5.6
1 - 12, 19, 20, 23 - 26
Mon 12/1 5.6 Z-score problem 1   (4:19)
Z-score problem 2   (5:06)
Z-score problem 3   (7:09)
Z-score problem 4   (4:13)
Normal Distribution Chart 5.6 Section 5.6
27, 28, 31 - 34, 37 - 43
5.7 Normal approximation of
the binomial distribution
  (14:09)
Airline overbooking spreadsheet
United airlines
United overbooking
A new idea
How to get $2000 for being bumped
Airlines have overbooked from the start
What to do if you are bumped
5.7 Section 5.7
1 - 5, 7 - 10, 13 - 17, 22
Wed 12/3 Insights End of Chapter 5 Review
Review
??? 12/??? Exam 5
Homework problems to work in class