(12>Application of Differential Equation of Order One<) Moonlight at High Noon. The fact that sunlight is absorbed by water is well known to any diver who has  dived to a depth of 100 feet. If 25 feet of water absorb 15% of the light that strikes the surface, at what  depth will the light at noon be as bright as a full moon, which is 1/300,000th as bright as the noonday  sun

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