Arectangular box is 8 and a half inches long,5and a fourth inches wide, and 4 inches high. what is its volume

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

Express -5 2/5 as an improper fraction.

Consider the first four terms of the sequence below. what is the 8th term of this sequence?