Answer:
The speed of the airplane is approximately 770 km/h (214 m/s).
Explanation:
Speed = 
Distance = 3080 km
Time = 4 hours
speed = 
= 770
speed = 770 km/h
The speed of the airplane is 770 km/h.
OR
Distance = 3080 km
But,
1 000 m = 1 km
3080 km = 3080000 m
distance = 3080000 m
Time = 4 hours
60 seconds = 1 minute
60 minutes = 1 hour
Thus, 4 hours = 60 x 60 x 4
= 14400 seconds
Therefore,
speed = 
= 213.8889
speed ≅ 214 m/s
The speed of the airplane is approximately 214 m/s.
Answer:
resolve disputes and ensure federal
Explanation:
it is the judicial branches job to make sure laws are constitutional.
Answer:
Europeans changed the economy from a model of producing foods for need to mainly the production of cash crops. All crops produced by Africans were exported and prices were set by the colonies. Africans were not allowed to grow these cash crops to benefit themselves.
I think the check and balances system work really well in united states.
This system prevent the government from becoming too tyrannical because it separate our government into legislative, executive, and judiciary branch.
If, one government handles all these three, the government could basically violate the law and directly change the law after that so it wouldn't be considered a crime
