An equation for estimating the speed of a tsunami is s=3.1√d where d is the depth of the ocean in meters and s is the speed in meters per second. find the depth of the ocean in meters when the speed of a tsunami is 250 meters per second. round your answer to the nearest tenth of a meter. a. 6503.6 b. 7523.7 c. 2402.5 d. 2231.4

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