Shilo is trying to compute the value of 27 + 55 + 13. she adds 27 + 13 to get 40, and then adds on 55. which of the following properties is shilo using?

A25-inch wide drum is used in a marching band. what area does the top of the drum cover? round to the nearest hundredth. (use 3.14 for pi.)

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

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