Ask your parents about it if they didn't help you can copy mine, 
Well I asked my parents about they told me that around their age there weren't lots of facilities they even rarely saw transportation facilities like cars and bikes there were no proper internet facilities e.t.c
When I said them what were the changes in the last 25 years they said there were drastic changes including social, economic, science, transportation, health e.t.c and many more
 
        
             
        
        
        
Here here here here here here here
 
        
        
        
Answer:
N=625/3
Step-by-step explanation:
1) 0.25 ⋅ 1.44N=75
2) 0.36N=75
3) 0.36N/0.36 = 75/0.36
4) N= 625/3
Hope that helps
Have a good day
 
        
                    
             
        
        
        
Answer:
7 min
Step-by-step explanation: