The price of a shirt was reduced from $40 to $28. By what percentage was the price of the shirt reduced? A. 28%

B. 12%

C. 70%

D. 30%

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

2,10,-50 next two numbers geometric sequence

Pls i’m super dumb and i need with this one it’s due tomorrow