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January 28, 2015

January 28, 2015

Posted by **Steve** on Tuesday, November 27, 2012 at 3:06am.

what depth will the light intensity be half that of the surface

- algebra -
**Steve**, Tuesday, November 27, 2012 at 4:35amat x=0, I = 12

so solve

log 6/12 = -x/8

log2 = x/8

x = 8log2

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