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##### 10.4 Common Logarithms

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**10.4 Common Logarithms**Algebra II w/trig**Base 10 logarithms – understood base 10 if nothing is**there) • Evaluate each expression to four decimal places. • log 50 • log 18 • log 42.3 • log 0.003**II. Solve each equations or inequality. Round to four**decimal places. • 43x = 12 B. 73x-1 > 21**III. Change of Base Formula**For all positive numbers a, b, and n, where a≠1 and b≠1 Remember: and**Evaluate:**1. log3 16 2. log3 202