i dont understand this can someone please help me.

Answer:
Difference = 2.25°
Step-by-step explanation:
Here we are given that at depth the Temperature T is inversely proportional to the depth x.
[tex]T[/tex] ∝ [tex]\frac{1}{x}[/tex]
[tex]T= 4500 \times \frac{1}{x}[/tex]
Where 4500 is constant
Now we have to find the difference in the temperature at 1200 mts and 3750 mts
1. x=1200
[tex]T= 4500 \times \frac{1}{x}[/tex]
[tex]T= 4500 \times \frac{1}{1200}[/tex]
[tex]T= 3.75[/tex]
2. x=3750
[tex]T= 4500 \times \frac{1}{x}[/tex]
[tex]T= 4500 \times \frac{1}{3750}[/tex]
[tex]T=1.2[/tex]
Hence Difference is
T = 3.75 -1.20
= 2.25
Therefore The difference of the temperature at 1200 mts and 3750 mts is T=2.25°