4x3 to the power of 2 am handing out brainiest

What is the range of the data below? .8090100

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

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?