The deeper you are under water; the less sunlight reaches you. The percent of sunlight, P, that reaches a depth d, in metres, can be modelled by the function p(d)=100(0.85)^d. a) Use your graph of P to calculate the average rate at which the sunlight is absorbed over the first 5 m.  b) Is the instantaneous rate at which sunlight is absorbed at a depth of 5 m greater than your answer in part d)? Explain.

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
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ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
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Chapter10: Radical Functions And Equations
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The deeper you are under water; the less sunlight reaches you. The percent of sunlight, P, that reaches a depth d, in metres, can be modelled by the function p(d)=100(0.85)^d.

a) Use your graph of P to calculate the average rate at which the sunlight is absorbed over the first 5 m. 

b) Is the instantaneous rate at which sunlight is absorbed at a depth of 5 m greater than your answer in part d)? Explain.                                                                                                                      

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