What is the speed of a 1,500kg car if its kinetic energy is 1,518,750 j?

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

Will give a: 122 b: 90 c: 48 d: 180

Which graph represents the linear function below? y-4= (4/3)(x-2)