Answer:
C 
Explanation:
It says is it a good idea the person so 1 person can say no and the other one can say yes so it is asks for a opinion
 
        
             
        
        
        
The average speed is 8 miles
        
             
        
        
        
<h3>Answer</h3>
1104 km/hour
<h3>Explanation</h3>
Distance between Dallas Texas to New York = 2760 km
Time the plane took from Dallas to New York = 2 hours
Time the plane took from New York back to Dallas = 2.5 hours
Formula to use 
<h3>distance = speed x time </h3>
Speed the plane took from Dallas to New York 
2760 = 2 x speed
speed = 2760 / 2
           = 1380 km/hour
Speed the plane took from New York to Dallas (ROUND TRIP)
2760 = 2.5 x speed
speed = 2760 / 2.5
            = 1104 km/hour
 
        
        
        
We can solve the problem by using the first law of thermodynamics:

where
 is the change in internal energy of the system
 is the change in internal energy of the system
 is the heat absorbed by the system
 is the heat absorbed by the system
 is the work done by the system on the surrounding
 is the work done by the system on the surrounding
In this problem, the work done by the system is

with a negative sign because the work is done by the surrounding on the system, while the heat absorbed is

with a negative sign as well because it is released by the system.
Therefore, by using the initial equation, we find

 
        
             
        
        
        
Answer: 40
Explanation:
I believe this is correct. I did 60/1.5 to get 40/mph