Suppose that the discrete random variable X has cumulative distribution function given by F(x) =    0 if x < 1 1 3 if 1 ≤ x < 4 3 1 2 if 4 3 ≤ x < 3 2 3 4 if 3 2 ≤ x < 9 5 1 if x ≥ 9 5 Find the possible values and the probability mass function X.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

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

Aregular pan has a length that is 4/3 the width. the total area of the pan is 432in.2. what is the width of the cake pan?