Final answer:
The range in temperatures for the year in Arizona is calculated by subtracting the minimum recorded temperature from the maximum recorded temperature, resulting in a range of 142°F.
Step-by-step explanation:
The student is asking about the range of temperatures in Arizona, which is a mathematical concept involving the difference between the maximum and minimum values.
To calculate the range of temperatures from a high of 121°F to a low of -21°F, we use the numerical expression:
Range = Maximum temperature - Minimum temperature
In this case, the range is:
Range = 121°F - (-21°F) = 121°F + 21°F = 142°F
Therefore, the range in temperatures for the year in Arizona is 142°F