(0.04)^(-15)=?

(0.04)^(-1.5)=?25b*125c.250d.625

Simplify: (0.04)^(-1.5)

(0.04)^(-1.5) on simplification gives

1 + (0.04) + (0.04)^(2) + …. infty =

Suppose that the diameter of an animal's pupil is given by f(x)=(160x^(-0.4)+90)/(4x^(-0.4)+15) where x is the intensity of light and f(x) is in mm. Find the diameter of the pupils with minimum light

Suppose that the diameter of an animal's pupil is given by f(x)=(160x^(-0.4)+90)/(4x^(-0.4)+15) where x is the intensity of light and f(x) is in mm. Find the diameter of the pupils with maximum light