Question

the table below shows the average temperatures at different cruising altitudes for airplanes.

cruising altitude	average temperature
20,000 ft	-12°f
30,000 ft	-48°f
40,000 ft	-70°f
50,000 ft	-70°f

what is the difference (in degrees) between the average temperatures at 12,000 ft and at 20,000 ft?

Explanation:

Step1: Identify temperatures

Temperature at 12000 ft is $16^{\circ}F$, at 20000 ft is $- 12^{\circ}F$.

Step2: Calculate difference

$16-(-12)=16 + 12=28$.

Answer:

28