A bookcase measures 13 feet wide and 24 feet tall. What would the bookcase measurements be on a scale dousing the scale 3cm:2 ft?

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

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