Can someone answer. there is one problem. there's a picture. you!

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?

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate

The value of cos 30° is the same as which of the following?