ASAP PLEASE!

Which could be the lengths of the sides of a right triangle?

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

Simplify the algebraic expression 8y-2(y+4)

Find the solution set for this equation: t^2+7t=0 separate the two values with a comma.