Answer:
12
Explanation:
600/50 is 12 so the answer is twelve 
 
        
             
        
        
        
Answer: Option (d) is correct.
Explanation:
Given,  1,152 British thermal units 
1 British thermal unit = 1055.06 joules
So, in 1,152 British thermal units there will be :

Hence, from the given options the closest answer is of option (d). So, option (d) is correct.
 
        
                    
             
        
        
        
Acceleration is F/M so the answer would be 12m/s^2
        
                    
             
        
        
        
Answer:
Explanation:
You have to declare which way is plus -- up or down. I will use down.
vi = - 2.85       The balloon is going up. That is the minus direction.
a = 9.81
d =   2.50 meters  distance in this case is from the object to the ground.
d = vi*t + 1/2 a t^2
-2.50 = -2.85*t + 1/2 * 9.81 * t^2
-2.50 = -2.85*t + 4.905 * t^2           transfer the left to the right.
-4.905 t^2 + 2.85*t + 2.50 = 0
Use the quadratic formula to solve for t.
It turns out that t = 1.06