# When light passes through water, its intensity I decreases according to the formula I(x) = I 0 e -kx , where I 0 is the initial intensity of the light and x is the depth in feet. If I 0

When light passes through water, its intensity I decreases according to the formula I(x) = I_{0}e^{-kx}, where I_{0} is the initial intensity of the light and x is the depth in feet. If I_{0} = 1000 lumens per square meter and k = 0.12, determine the depth at which the intensity is 25% of I_{0}.

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**Related Book For**

## College Algebra With Modeling And Visualization

**ISBN:** 9780134418049

6th Edition

**Authors:** Gary Rockswold

**Question Details**

Chapter #

**5**Section: Exercises 5.6

Problem: 101

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