Mario has 2 1/4 pounds of trail mix. he puts equal amounts of the trail mix into 6 bags for a hike with his friends. if he uses all the trail mix, how many pounds will be in each bag? i need with this

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

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