Is anybody else being weird?? All of my points are gone, and it says i had 142 notifications?? but they won’t show ive lost thousands of points

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

Can you me find the missing length. i attached an image.

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