Chapter 4: Problem 46
Graph \(f(x)=(1)^{x}\) and \(g(x)=\log _{4} x\) in the same rectangular coordinate system.
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Chapter 4: Problem 46
Graph \(f(x)=(1)^{x}\) and \(g(x)=\log _{4} x\) in the same rectangular coordinate system.
These are the key concepts you need to understand to accurately answer the question.
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Evaluate or simplify each expression without using a calculator. $$ \log 1000 $$
Find the domain of each logarithmic function. $$ f(x)=\ln (x-2)^{2} $$
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 ruptured eardrum. (Any exposure to sounds of 130 decibels or higher puts a person at immediate risk for hearing damage.) Use the formula to solve. What is the decibel level of a normal conversation, \(3.2 \times 10^{-6}\) watt per meter \(^{2} ?\)
Evaluate or simplify each expression without using a calculator. $$ \log 10^{8} $$
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 ruptured eardrum. (Any exposure to sounds of 130 decibels or higher puts a person at immediate risk for hearing damage.) Use the formula to solve. The sound of a blue whale can be heard 500 miles away, reaching an intensity of \(6.3 \times 10^{6}\) watts per meter\(^{2}\). Determine the decibel level of this sound. At close range, can the sound of a blue whale rupture the human eardrum?
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