Solve.
-A weather forecaster predicts that the temperature will drop 3 degrees each hour for the next 5 hours. If the temperature is -1 degrees before the temperature starts falling, what is the temperature after the drop?
A) 15°
B) -15°
C) -16°
D) -9°

Question

Quizplus · Accepted Answer

The temperature will drop 3 degrees each hour for the next 5 hours. 
So, the temperature after 1 hour will be: (-1) - 3 = -4 degrees 
The temperature after 2 hours will be: (-4) - 3 = -7 degrees 
The temperature after 3 hours will be: (-7) - 3 = -10 degrees 
The temperature after 4 hours will be: (-10) - 3 = -13 degrees 
The temperature after 5 hours will be: (-13) - 3 = -16 degrees

Therefore, the temperature after the drop is -16°. If the temperature is -1 degrees before the drop and it drops by 3 degrees for each of the 5 hours, then the total drop in temperature is:

3 degrees/hour × 5 hours = 15 degrees

Therefore, the final temperature is:

-1 degrees - 15 degrees = -16 degrees

So the answer is C) -16°.

Solve. -A Weather Forecaster Predicts That the Temperature Will Drop 3