A rectangle has a width of 10 cm rectangles length is 4 times it's with what is the perimeter of the rectangle

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

Jim had 3,067.48 in his checking account he wrote a check to pay for two airplane tickets. his account now has 1,845.24.

There is a 9% chance that a booked gig will get cancelled. if you have 4 gigs in a row, what is the probability none of them will get cancelled!