What are possible values for p and q in 3^p x 3^q=1/9

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?

Find the distance between c and d on the number line c=3 and d=11

Find y to the nearest hundreds place