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Unformatted text preview: 1 MATH 140B QUIZ#13 Due: Fri Dec 14, 2007 The first two questions pertain to the following situation. Consider the following socalled impulse function C ( t ) = e − t/ 4 e − t/ 3 , t ≥ . which arises in connection with the dynamics of radioiodine in the ecosystem. This question is essentially a curve sketching question for exponential functions. [ 2 ] 1. Which of the following 3 statements are true? i) C has absolute minimum at t = 0. ii) C has an absolute maximum at t = 12 ln(4 / 3) . iii) There’s a horizontal asymptote at C = 1. A) i) only B) ii) only C) i) and ii) only D) ii) and iii) only E) None of the above answers A)D) are correct [ 2 ] 2. Which of the following 3 statements are true? i) C ′′ ( t ) = 1 16 e − t/ 4 + 1 9 e − t/ 3 . ii) C ′′ ( t ) = 0 when t = 24 ln(4 / 3) . iii) There is only one point of inflection in the graph of C . A) i) only B) ii) only C) iii) only D) ii) and iii) only E) None of the above answers A)D) are correct The next two questions pertain to the following situation.The next two questions pertain to the following situation....
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This note was uploaded on 03/30/2008 for the course MATH 140B taught by Professor Fabbri,marc during the Fall '07 term at Penn State.
 Fall '07
 FABBRI,MARC
 Math

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