140Bquiz13a - 1 MATH 140B QUIZ#13 Due: Fri Dec 14, 2007 The...

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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 so-called 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) Theres 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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140Bquiz13a - 1 MATH 140B QUIZ#13 Due: Fri Dec 14, 2007 The...

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