SOLUTION: Light intensity is reduced by 3.5% for each meter a diver descends below the water surface. At what depth is the light intensity only 15% of that at the surface?

Question 1114123: Light intensity is reduced by 3.5% for each meter a diver descends below the water surface. At what depth is the light intensity only 15% of that at the surface?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Light intensity is reduced by 3.5% for each meter a diver descends below the water surface.
At what depth is the light intensity only 15% of that at the surface?
:
a 3.5% reduction = 96.5% of the light remains
using the decimal equiv of per cent
d = depth in meters

using natural logs
=
the log equiv of exponent
=
d =
d = 53.25 meters below the surface

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