What are the solution(s) of the quadratic equation 98 – x2 = 0? x = x = x = no real solution

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

Look at the figure xyz in the coordinate plane. find the perimeter of the figure rounded to the nearest tenth.

I’m focused and need fr anyone quick