John is playing a video game in which he needs to catch balls. He earns 20 points for each of the first 25 balls that he catches and 1 1 2times the regular score for every additional ball that he catches. How many points does he earn for catching 30 balls?

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

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities