Question

A farmer is told the temperature will decrease approximately 4 degrees every hour for the next 3 hours. What signed number represents the total change in temperature expected over the next 3 hours?

A) -12°F
B) +12°F
C) -3°F
D) +3°F

Answer 1

The total temperature change expected over the next 3 hours due to a decrease of 4 degrees per hour is -12°F, represented by answer A) -12°F.

Step-by-step explanation:

The signed number that represents the total change in temperature expected over the next 3 hours, when the temperature decreases by approximately 4 degrees every hour, is -12°F. This is because a decrease in temperature is represented by a negative number. If the temperature is dropping 4°F every hour for 3 hours, the calculation would be:

-4°F/hour × 3 hours = -12°F

Therefore, the correct answer is A) -12°F.