The dimensions of a rectangular book cover when it is laid flat are shown.

which computation could be used to find the area of the book cover?

a.
multiply 16 by 2

b.
add 16 and 11

c.
multiply 16 by 11

d.
add 16 and 11 and multiply the answer by 2

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