How long does it take to double a $1,000 investment that pays 6.5% annual interest, compounded monthly?

Which equation can you use to solve this problem?

Which ahows the graph of the solution set of 6x+4y< 12

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

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