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exam1_1 - Name TA Math 10A Midterm Exam 1 Sec No PID Sec...

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Name: PID: TA: Sec. No: Sec. Time: Math 10A. Midterm Exam 1 October 20, 2009 Turn off and put away your cell phone. You may use any type of calculator, but no other electronic devices during this exam. You may use one page of notes, but no books or other assistance during this exam. You may leave answers in symbolic form, for example 42 or ln(6) . Read each question carefully, and answer each question completely. Show all of your work; no credit will be given for unsupported answers. Write your solutions clearly and legibly; no credit will be given for illegible solutions. If any question is not clear, ask for clarification. # Points Score 1 6 2 6 3 6 4 6 Σ 24
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1. (6 points) For parts (a)-(e), use the following tables of values of the functions f and g . x f ( x ) - 4 4 - 2 1 0 - 2 2 - 5 4 - 8 x g ( x ) 0 - 6 1 - 2 2 0 3 2 4 5 (a) Find g ( f ( - 4)) (b) Find f (0) g (0) (c) Find f - 1 ( g (1)) (d) Find g ( g - 1 (2)) (e) One of the functions f and g is a linear function and the other is not. Find a formula for the linear function.
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2. (6 points) You have 150 grams of a radioactive substance which decays exponentially.
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