Can someone please help me (-4,1)(0,6)

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Over the course of a month, a person's weight decreases. what type of relationship is this? a. positive relationship