: In Exercises 64–73, solve each exponential equation. Where necessary, express the solution set in terms of natural or common logarithms and use a calculator
: In Exercises 64–73, solve each exponential equation. Where
necessary, express the solution set in terms of natural or common
logarithms and use a calculator to obtain a decimal approximation,
correct to two decimal places, for the solution.
64. 24x-2 = 64
65. 125* = 25
%3D
66. 10 = 7000
67. 9*+2 = 27-
68. 8* = 12,143
69. 9esx
= 1269
%3D
70. e12-5x – 7 = 123
71. 54r+2 = 37,500
%3D
72. 3*+4 = 72r-1
73. e2 – e – 6 = 0
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