Which of these can be written as an equation? Select all that apply.
F. The sum of 10 and p is 31
G. Three is less than twice a
H. Half the product of five and j
J. Four times n is 24
K. Two times 0.75 plus m

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