Date or date due  Assignment or event  
Wednesday, Jan. 20  First day of class  
Monday, Jan. 25  Last day to add a course  
HW #1  Friday, Jan. 29 
Selfchecked problems: (these problems need not be turned in)
Section 1.1: 5, 7, 17 Section 1.2: 1, 3, 11, 19, 21 Section 1.3: 9, 11 Instructorcorrected problems: (these problems should be turned in) Section 1.1: 16 Section 1.2: 24 Section 1.3: 10. Also specify the units in which t and A(t) are to be measured. Homework is to be turned in in gradable condition. In particular:

Monday, Feb. 1  Last day to drop a course  
HW #2  Friday, Feb. 5 
Selfchecked problems: (these problems need not be turned in)
Section 1.3: 3, 7, 15, 29 Section 2.1: 1, 2, 3 Instructorcorrected problems: (these problems should be turned in) Section 1.3: 4, 28 Section 2.1: 4. The direction fields for problems 1–4 may be found in this PDF file. 
HW #3  Friday, Feb. 12 
Selfchecked problems: (these problems need not be turned in)
Section 2.1: 19, 21, 27 Section 2.2: 1, 5, 9, 31, 33 Section 2.3: 25, 33, 35, 39 Instructorcorrected problems: (these problems should be turned in) Section 2.1: 24 Section 2.2: 32 Section 2.3: 28 
Friday, Feb. 19  First midterm exam–good luck! You will be allowed a nongraphing calculator.  
HW #4  Friday, Feb. 26 
Selfchecked problems: (these problems need not be turned in)
Section 2.3: 39 Section 2.4: 9, 11, 21, 25, 27, 29, 31 Section 2.5: 23, 25 Instructorcorrected problems: (these problems should be turned in) Section 2.3: 40 Section 2.4: 26, 32 Section 2.5: 24 
HW #5  Friday, Mar. 4 
Selfchecked problems: (these problems need not be turned in)
Section 2.5: 7, 9, 11, 13 Section 3.1: 11, 23, 25, 33 Section 3.2: 5 Section 4.1: 1, 3, 5 Do problem (AB 1) in this file. Instructorcorrected problems: (these problems should be turned in) Section 2.5: 14 Section 3.1: 14 Section 3.2: 6 Do problem (AB 2) in this file. 
HW #6  Friday, Mar. 11 
Selfchecked problems: (these problems need not be turned in)
Section 4.1: 9, 15, 19, 21 Section 4.3: 1, 5, 7, 13, 19, 29, 49, 53 Instructorcorrected problems: (these problems should be turned in) Section 4.1: 10 Section 4.3: 12, 32 
Tuesday, Mar. 15  Office hours canceled  
Thursday, Mar. 17  Office hours at 3:30 rather than 2  
Friday, Mar. 18  Second midterm exam–good luck! You will be allowed a nongraphing calculator.  
Mar. 21–25  Spring break–have fun!  
HW #7  Friday, Apr. 1 
Selfchecked problems: (these problems need not be turned in)
Section 4.2: 9, 11, 13, 17, 19 Section 4.6: 1, 3, 9, 15, 17, 23 Instructorcorrected problems: (these problems should be turned in) Section 4.2: 10, 20 Section 4.6: 4 
HW #8  Friday, Apr. 8 
Selfchecked problems: (these problems need not be turned in)
Section 7.1: 1, 3, 5, 13, 15, 17, 19, 23, 27, 31. Find the Laplace transform of t³ using the definition. Section 7.2: 1, 5, 7, 11, 15, 19, 25, 29, 31, 33, 35, 37, 39 Instructorcorrected problems: (these problems should be turned in) Section 7.1: 6 Section 7.2: 34, 38 
HW #9  Friday, Apr. 15 
Selfchecked problems: (these problems need not be turned in)
Section 7.2: 41 Section 7.3: 3, 7, 11, 13, 15, 19, 21, 25, 27, 29, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 63, 65, 69 Instructorcorrected problems: (these problems should be turned in) Section 7.3: 30, 66, 68 
Friday, Apr. 22  Last day to withdraw from a course  
Friday, Apr. 22  Third midterm exam–good luck! You will be allowed a nongraphing calculator.  
HW #10  Friday, Apr. 29 
Selfchecked problems: (these problems need not be turned in)
Section 7.4: 1, 3, 7, 31, 33, 35, 36 Section 7.5: 1, 3, 7, 9. Plot the graphs of y (and in problems 3, 7, 9, of dy/dt). Describe the special features you notice. What special features do you expect dy/dt (problem 1) or d²y/dt² (problems 3, 7, 9) to exhibit? A good way to plot functions is to use Desmos or Wolfram Alpha. Notice that Wolfram Alpha refers to the unit step function as “theta” rather than “u”. Instructorcorrected problems: (these problems should be turned in) Section 7.4: 6 Section 7.5: 6. Plot the graphs of y and dy/dt. Describe the special features you notice at t=2π and t=4π. What special features do you expect d²y/dt² to exhibit near t=2π and t=4π? 
Wednesday, May 4  Last day of class  
HW #11  Wednesday, May 4 
Selfchecked problems: (these problems need not be turned in)
Section 8.1: 1, 3, 5, 7, 9 Section 8.2: 1, 5, 9, 17, 19, 21, 32, 33, 37, 47. On Problems 17, 32, and 47, you may use a phase plane plotter to obtain the phase portrait. Instructorcorrected problems: (these problems should be turned in) Section 8.1: 4 Section 8.2: 4, 34. Sketch the phase portrait for both problems. Complete the online course evaluation by Friday, May 6. 
Friday, May 13  Final exam, 10:15 a.m.–12:15 p.m. Good luck! You will be allowed a nongraphing calculator.
Here are some suggested practice problems. If you would like to review calculus before the final exam, here are some suggested problems. 
Lecture  Mon, Wed, Fri, 12:551:45 p.m., SCEN 408 
Drill 
Section D013: Tue, Thu 9:4010:30 a.m., KIMP 201 Section D014: Tue, Thu 8:008:50 a.m., KIMP 310 Section D015: Tue, Thu 2:002:50 p.m., KIMP 306 
Instructor  Ariel Barton 
aeb019@uark.edu  
Office  SCEN 222 
Office hours 
Tuesday 2:00, Wednesday 3:00–3:30, Thursday 9:30, or by appointment.
No class meetings or office hours will be held on days when the university is closed due to inclement weather. 
Graduate Assistant  Rusty Permenter rperment@uark.edu 
Course Description: First and second order ordinary differential equations, the Laplace transform, and matrix systems of ordinary differential equations.
Prerequisites: MATH 2564 with a grade of C or better.
Text: Differential Equations with BoundaryValue Problems, Eighth Edition, by Dennis G. Zill and Warren S. Wright.
Homework: Assignments will be posted to this course website. The complete assignment will be posted at least four days before the due date. Each week you will be assigned a number of selfchecked problems and a smaller number of instructorcorrected problems. You are encouraged to work together on homeworks, but you must write up your solutions independently.
Instructorcorrected problems should be turned in for grading on the due date. We expect you to turn in your homework in class; if you cannot make it to class, either ask a classmate to turn in your homework for you or ask Rusty Permenter if he will accept homework at some other time. Late homework will not be accepted except in the case of a medical or other unforeseeable emergency; if you will be absent on the due date, consult with Rusty Permenter and arrange to turn homework in early.
Selfchecked problems will not be graded and need not be turned in. You will be able to check your answers by looking at the answers given in the back of the book. It is important that you do these problems; you will learn the material much better if you practice it by doing all problems, and material covered only on selfchecked problems and not on instructorcorrected problems will still appear on the midterm tests and final exam.
I expect to have 11 assignments over the course of the semester; your two lowest scores will be dropped and the remaining 9 assignments will comprise 20% of your course grade.
Tests: There will be three midterms tests and a final exam. I plan to hold midterm exams during class time Weeks 5, 9 and 13, on February 19, March 18 and April 22.
The final exam will occur in our regular classroom at the time indicated on the registrar’s website.
Makeup exams will only be given in exceptional circumstances (at the instructor’s discretion), and then only when notice is given to the instructor beforehand and a suitable written excuse forthcoming.
If you require extra accommodations on an exam, notify your instructor as soon as possible, but in all cases at least one week before the exam is to be held.
Course grade: Here is how I plan to weigh your grades:
Homework  20% 
Midterm tests  15% each 
Final  35% 
Incompletes: Only given in extreme circumstances, and only when the student has satisfactorily completed all but a small portion of the work in the course. Students must make prior arrangements with the professor well before the end of the semester.