Please help me with this math question guys’d

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units

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

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?