e = 2.718281828459045
f(x) = 16.0 * e^(-(x) * 0.19269) + 4.0
A = Intersect(f, a, (5.090192812349744, 10.000000000000325))
g(x) = 16.0 * e^(-(0.09109) * x) + 4.0
B = Intersect(g, a, (10.76769407192528, 10.000000000000314))
h(x) = 16.0 * e^(-(0.00532) * x) + 4.0
C = Intersect(h, a, (184.3664009420464, 10.000000000000236))
k = 0.04 (slider from 0 to 0.5, step 0.0010)
i(x) = 16.0 * e^(-(k) * x) + 4.0
D = Intersect(i, a, (24.520731325293138, 10.000000000000004))