Answer:
The answer to the problem is 1/2
 
        
             
        
        
        
Answer:
 Thermometer reading of the lowest recorded temperature at Oymyakon was -96.2° F
Thermometer reading of the lowest recorded temperature at Prospect Creek was -80° F
Step-by-step explanation:
If the temperature is x° F below 0° F then the thermometer reading is -x° F
It is given that the Lowest temperature recorded at Oymyakon in Russai was 96.2°F below 0°F 
So the thermometer reading of the lowest recorded temperature at Oymyakon was -96.2° F
Also it is given that the Lowest temperature recorded at Prospect Creek in Alaska  was 80°F below 0° F
So the thermometer reading of the lowest recorded temperature at Prospect Creek was -80° F
 
        
             
        
        
        
f ( - 2 ) = 5 × 3^( - 2 ) 
f ( - 2 ) = 5 × 1/9 
f ( - 2 ) = 5/9