OpenStax, Algebra and Trigonometry 2e §6.3 Logarithmic Functions · Exercise 69 · Algebra · Exponentials & logarithms

Logarithmic Functions · Exercise 69

The exposure index $E I$ for a camera is a measurement of the amount of light that hits the image receptor. It is determined by the equation $E I = l o g_{2} (\frac{f ^{2}}{t}),$ where $f$ is the “f-stop” setting on the camera, and $t$ is the exposure time in seconds. Suppose the f-stop setting is $8$ and the desired exposure time is $2$ seconds. What will the resulting exposure index be?

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OpenStax, Algebra and Trigonometry 2e · §6.3 Logarithmic Functions · Exercise 69

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