For this case we have that the temperature drops steadily at a speed of [tex]{\sf0.8\:\frac{degree}{hours}}[/tex], that is, every hour drops 0.8 degrees. So, we can propose a rule of three:
1 hour ----------> 0.8 degrees
x ------------------> 4.4 degrees
Where the variable "x" represents the number of hours that must pass for the temperature to decrease by 4.4 degrees.
[tex]{\sf{x\:=\:\frac{4.4\:x\:1}{0.8}[/tex]
[tex]{\sf{x\:=\:5.5[/tex]
Thus, for the temperature to decrease by 4.4 degrees, 5.5 hours must pass.
Answer:
5.5 hours
