8•10^-3 is how many times as great as 4•10^-6? a. 2•10^9 b. 2•10^3 c. 2•10^-9 d. 2•10^-3

Fred has a total of 62 dvd and cd. if the number of cd is three more than two times the number of dvd, how many cd does he have?

Apath 3 m wide runs around the inside of a square park inside 60 m.find the area of the path.pls

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz