you have a credit card with an APR of 16 you begin with a balance of $750 in the first month you make a payment of $500 and you make charging the mounting of $300 in the second month you make a payment of $350 and you make changes of $700

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