Josiah begins his shopping at the music store. He finds the CD he wants, and it has a price sticker that reads $15.99. The tax rate for the city is 8.25%. how much will Josiah pay in tax for the CD? round your answer to the nearest cent. what is the total cost Josiah will pay for the CD?​

How do you solving the solution of each system using elimination?

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

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?