9. is 1.0227 a rational number? explain.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

How do you convert 1.27 to a percentage

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