Can anyone figure this out ?

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?

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

Describe how you can act financially responsible.