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Pre-Calculus Practice Problem 109

# Pre-Calculus Practice Problem 109 - thousandth 1 1400 =...

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Unit 3, Activity 7, Solving Exponential Equations with Answers Blackline Masters, Advanced Math-Pre-Calculus Page 107 Comprehensive Curriculum, Revised 2008 Part A Solve for x and give the exact answer. 1. 2 9 3 1 + = x x x = -4/3 2. 16 x = 8 x - 1 x = -3 3. 2 x - 2 = 3 x = 2 2 ln 3 ln + or 2 ln 12 ln which is 585 . 3 4. 2 x - 1 = 3 x + 1 3 2 ln 6 ln which is 419 . 4 Part B Solve for x . Use your calculator to obtain the answer. Write the answer to the nearest
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Unformatted text preview: thousandth. 1. 1400 = 350e-.2 x-6.93 2 . 14.53(1.09) 2x = 2013 15.24 3 . 2500 = 5100(.79) x 3.02 4 . 45 8 2 = − x ( ) 169 . 8 log 64 45 log − ≈ = 5 . 200 = 40(1.12) 3t t = 12 . 1 ln 3 5 ln 734 . 4 ≈ Part C. Use a graphing utility to solve the equation e x = 5-2 x The two graphs intersect at x ≈ 1.06....
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