The function f(x) = 20(0.975)^x models the percentage of surface sunlight, f(x), that reaches a depth of x feet beneath the surface of the ocean. The figure shows the graph of this function. Use this information to solve Exercises 105–106.Use the function to determine at what depth, to the nearest foot, there is 1% of surface sunlight. How is this shown on the graph of f ?

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Percentage of Surface Sunlight Intensity 14 12 10 8 6 4 2 Intensity of Sunlight Beneath the Ocean's Surface 20 II f(x)=20(0.975).* 40 60 80 100 120 140 Ocean Depth (feet)