At the city museum, child admission is $ 5.30 and adult admission is $ 8.50 . on tuesday, 162 tickets were sold for a total sales of $ 1073.00 . how many child tickets were sold that day?

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