In an auditorium, of the students are fifth graders, are fourth graders, and of the remaining students are second graders. If there are 96 students in the auditorium, how many second graders are there?
Need help and it is not 24

What is the binomial expansion of (2x-3)^5

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

Use complete sentences to differentiate between a regular tessellation, and a pure tessellation. be sure to include specific types of polygons in your explanation.