Chapter 12: Problem 4
Write each equation in its equivalent exponential form. $$2=\log _{9} x$$
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Chapter 12: Problem 4
Write each equation in its equivalent exponential form. $$2=\log _{9} x$$
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Solve each equation. $$\log _{2}(x-3)+\log _{2} x-\log _{2}(x+2)=2$$
You overhear a student talking about a property of logarithms in which division becomes subtraction. Explain what the student means by this.
The loudness level of a sound, \(D,\) in decibels, is given by the formula $$D=10 \log \left(10^{12} I\right)$$ where I is the intensity of the sound, in watts per meter \(^{2} .\) Decibel levels range from \(0,\) a barely audible sound, to \(160,\) a sound resulting in a nuptured eardrum. Use the formula to solve Exercises. The sound of a blue whale can be heard 500 miles away, reaching an intensity of \(6.3 \times 10^{6}\) watts per meter? Determine the decibel level of this sound. At close range, can the sound of a blue whale rupture the human eardrum?
Describe the following property using words: \(\log _{b} b^{x}=x\)
Graph \(f\) and \(g\) in the same viewing rectangle. Then describe the relationship of the graph of g to the graph of \(f\). $$f(x)=\log x, g(x)=-\log x$$
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