Solve for the missing side, x

What is the base of 1/9 to the power of 2

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?