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Intermediate Algebra – Student Workbook – Second Edition 2013

Intermediate Algebra – Student Workbook – Second Edition 2013

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Lesson 4b <strong>–</strong> More on Logarithms<br />

Mini-Lesson<br />

Problem 4<br />

MEDIA EXAMPLE <strong>–</strong> SOLVE EXPONENTIAL EQUATIONS<br />

Solve 3 x = 25 for x<br />

Round the final result to three decimal<br />

places.<br />

Original Problem Statement<br />

Step 1: ISOLATE the exponential part of the<br />

equation<br />

Step 2: Change the equation to LOGARITHMIC<br />

form<br />

Step 3: ISOLATE the variable<br />

Step 4: IDENTIFY the final result in EXACT form<br />

then in rounded form as indicated by the problem.<br />

You may need to use Change of Base here to<br />

compute your logarithm.<br />

Step 5: CHECK your result by using the graphing<br />

(intersection) method to solve the original problem<br />

Scottsdale Community College Page 166 <strong>Intermediate</strong> <strong>Algebra</strong>

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