Answer:
ΔT = ( -19°C - 11°C) = -30°C
Step-by-step explanation:
When we have a given variable, let's call it X, the change of X in a given interval is written as:
ΔX = (X₂ - X₁)
Where:
X₂ = final value of the variable
X₁ = initial value of the variable.
In this case, we have the temperature, and we know that the initial temperature is 11°C, then:
T₁ = 11°C
While the final temperature is -19°C, then:
T₂ = -19°C
Then the change will be:
ΔT = ( -19°C - 11°C) = -30°C
This is the wanted expression.
