Answer: [tex]75^{\circ}F[/tex]
Step-by-step explanation:
Given
If the temperature falls by [tex]8^{\circ}[/tex] in 3 hours
Present temperature is [tex]67^{\circ}F[/tex]
The difference in temperature i.e.
[tex]\Rightarrow \text{Previous Temperature}-\text{Present temperature}=8\\\Rightarrow \text{Previous Temperature}=8+67=75^{\circ}F[/tex]
Temperature 3 hours ago is [tex]75^{\circ}F[/tex]
