Each letter of the word divisibility is written on a separate card and the cards are placed in a bag. then two cards are selected randomly without replacing the first card. find p (letter l, letter l)

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.

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