Two boats leave the same portheading in opposite directions. One boat travels 10 miles per hour and the other boat travels at 12 miles per hour. Formulate an equation in order to determine how long it will take for the two boats be 33 miles apart. Solve your equation and show all of your work.

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