Question 1006251
L(x)=100e^(-3.8) at 4 feet.
This is 2.2%
I want 50% or 50=100e^(-0.95x)
0.5=e^(-0.95x)
ln of both sides
-0.693=-0.95 x
At 0.73 feet, dividing both sides by -0.95.