Life Sci 1.5.59 Question Help Marine life is dependent upon the microscopic plan

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Life Sci 1.5.59

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Marine life is dependent upon the microscopic plant life that exists in the photic? zone, a zone that goes to a depth where about? 1% of the surface light remains. In some waters with a great deal of? sediment, the photic zone may go down only 15 or 20 feet. In some murky? harbors, the intensity of light d feet below the surface is given by

Upper I equals Upper I 0 e Superscript negative 0.36 dI=I0e?0.36d?,

where

Upper I 0I0

is the intensity of light at the surface. What percentage of the surface light will reach a depth of?(A)

55

?feet? ? (B)

1010

?feet??(A) The percentage of surface light at

55

feet is

nothing?%.

?(Round to the nearest percent as? needed.)

Life Sci 1.5.59

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Explanation / Answer

it is given that in some murby harbours the intensity of light is d feet below the surface is given approximately by the equation

I=I0e -0.36d

with the condition that 1% of the initial light remain already in the photic zone I0=1

now when light reaches a depth of 55 feet, It is replaced the depth d with 55 in given equation

I=I0e -0.36d

Ie -0.36x55

Ie-19.8

1X17.0817181715

= 17.0817

as the value must be in percentage therefore

17.08 X 100/100

=17.08

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