Answer:
Option B, 7 degrees
Step-by-step explanation:
Step 1: Subtract new temperature from original temperature
68 - 40
28
Step 2: Divide the amount of hours by the change
28 / 4
7
Answer: Option B, 7 degrees
B
Change = 40 - 68 = -28
In 4 hours
Per hour: -28/4
= -7
