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3 years ago

If each foot of water in a lake screens out 60% of the light above, what percent of the light passes through 5 feet of water?

1 answer:

8 0

The amount of light passing through each foot the water in the lake = 100% - 60% = 40%
The percent of light passing through 5 feet of water = 0.4^5 = 0.01024 = 1.02%

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