Is 4.15 less or greater than 4.051

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?

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

Free points also plz look my profile and answer really stuff