Solve the Problem. -The Intensity of Light I at Time T Hours After

question 55

Multiple Choice

Solve the problem.
-The intensity of light I at time t hours after sunrise and at a depth of x feet below the ocean surface is given by where D is the length of daylight in hours, Io is the intensity of light on the surface of the water at midday, and k is a positive constant. Assume In a study of the effect
Of light on ocean plants, a scientist needs to determine the minimum depth x at which a plant would never at
Any time be exposed to an intensity of light greater than 25. What is this minimum depth?

• A) 385 ft
• B) 108 ft
• C) 139 ft
• D) 65 ft

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