I will mark Brainliest! Please Answer me 6th grade question

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 chord ab is congruent to chord cd, then what must be true about ef and eg?

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?