Antonio planned to read 15 books over the summer for the library's summer reading challenge. at the end of july he has read 4/5 of the books. how many books has he read?

How do the graphs of y = 1/x and y=5/x+6 compare?

The measure of an angle is 117°. what is the measure of a supplementary angle?

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