Which nation's economy could best be described as a command economy, where the government determines guidelines for economic development and sets goals for economic production?

What is the solution to the equation 9^(x+1) =27

On a piece of paper graph f(x)=5•(0.4)^x

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.