OldE1PracticeProblems-1

# OldE1PracticeProblems-1 - Math 3323-Exam 1 Practice...

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09/12/2006 10:38 PM Math 3323--Exam 1 Practice Problems Page 1 of 4 file:///Volumes/USB%20MEMORY/60912/3323/Practice_1.html Math 3323--Fall 1999 Some old Exam 1 problems, for practice Check back later for answers 1. Solve the first order linear initial value problem 2. Solve the first order linear initial value problem 3. Solve the first order linear initial value problem 4. Solve the initial value problem 5. Solve the initial value problem 6. If 10% of a radioactive substance decays in 10 minutes, how long does it take 20% to decay? 7. Let P(t) = the population of the earth, measured in billions. According to the Malthusian Law,

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09/12/2006 10:38 PM Math 3323--Exam 1 Practice Problems Page 2 of 4 file:///Volumes/USB%20MEMORY/60912/3323/Practice_1.html (a) At time t = 0 (1650 A.D.), the population was 1/4 ; at time t = 300 (1950 A.D.), the population was 2.5 . Find k. (b) According to this model, when will the population reach 25 ? 8. In a certain shop, Newton's Law of Cooling says
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OldE1PracticeProblems-1 - Math 3323-Exam 1 Practice...

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