Answer:
The correct option is D. -17.5 degrees
Step-by-step explanation:
The daytime temperature in Apple Valley is falling by 2.5 degrees each day
Therefore, Change in the temperature each day = -2.5 degrees
Now, we need to find the net change in the daily temperature after one calendar week
Now, number of days in one calendar week = 7
So, Net change in the daily temperature after one calendar week = Daily change × Number of days in one calendar week
⇒ Net change in the daily temperature after one calendar week = -2.5 × 7
⇒ Net change in the daily temperature after one calendar week = -17.5 degrees
Therefore, The correct option is D. -17.5 degrees