greeting oh dear people of mine, how doth thou sun rise and fall so effortlessly? how are thou people of today?​

What is the size of the matrix resulting from

True or false look at the picture pls : /

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?