Carlos is a service technician for office equipment. The cost for a service call from Carlos is represented by the linear equation y = mx + b where x is the number of hours Carlos spends on a service call and y is the total cost of the call. Which of the following is true?

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