The temperature in a chemical plant was -5oC at 2.00 am. The temperature fell by 6oC and then rose again by 7oC. What was the final temperature?
A
-6oC
B
-4oC
C
4oC
D
8oC
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Temperature = -5oC
It fell by 6oC = -5oC - 6oC
= -11oC
Then rose by 7oC = -11 + 7
= -4oC (final temperature)
Source: Myschool Past Questions Archive (Record #36199)