Exponents Question
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Grade 11 Exponents CCSS: HSF-LE.B.5
Sunlight decreases in intensity as it passes deeper into a lake. Its intensity is reduced by 20% for every meter it descends. Which function models the intensity of light at a depth of d meters?
- [math]I(d) = I₀(0.20^d)[/math]
- I(d) = I₀ − 0.20d
- [math]I(d) = I₀(0.80^d)[/math]
- [math]I(d) = I₀(1.20^d)[/math]
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