The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. What is the approximate pH of a solution if the concentration of hydrogen ions is 5.0 × 10–4 moles per liter?
The loudness of a compactor is 94 dB. Its sound intensity is about 0.00250.00430.0081.
The sound intensity of the jack hammer is about 2.051.851.6 times the sound intensity of the compactor.
The loudness of a pile driver is 112 dB. About how many times the sound intensity of the jackhammer is the sound intensity of a pile driver? Round to the nearest ten.
40
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Assignment
Modeling with Exponential and Logarithmic Equations