The bottom of a pylon is 3 1/2 yards below ground. The top of the pylon is 2 1/2 yards above the ground. How tall is the pylon?

The triangles are similar. what is the value of x? x=

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

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.