Question 581042
the function y=20*.975^x models the intensity of sunlight beneath the surface of the ocean. 
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the output y represents the percent of surface sunlight intensity that reaches a depth of x feet. 
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the model is accurate from about 20 feet to about 600 feet beneath the surface. find the percent of sunlight 50 feet beneath the surface. 
y=20*.975^x
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y = 20*0.975^50
y = 20*0.2820
y = 5.64%
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find the percent of sunlight at a depth of 370 feet.
y = 20*.975^x
y = 20*0.975^370
y = 20*0.00008545
y = 0.0017%
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Cheers,
Stan H.
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