Final answer:
The difference in temperature at a ski resort between -2°C and -23°C is 21°C. The calculation is performed by subtracting the lowest temperature from the highest, considering the negative signs.
Step-by-step explanation:
The question is asking us to find the difference in temperature between the highest and the lowest temperatures at a ski resort. To calculate the difference, you subtract the lower temperature from the higher temperature.
In this case, we have a high of -2°C and a low of -23°C. The difference is:
-2°C - (-23°C) = -2°C + 23°C = 21°C
So, the correct answer is B) 21°C.