The speed of bullet = 
850 m/s 
Distance given = 1 km = 1000m 
S = D/t 
t • S = D/t • t 
St = D 
St/S = D/S 
t = D/S 
t = 1000m/850m/s
t = 1.176 s
It will take the bullet 1.176 or about 1.18 seconds to go 1 km.
        
             
        
        
        
It's 12.1 m/s, assuming that's the launch velocity that's given.
For projectile motion, velocity's y-component is parabolic/quadratic. It's x-component is constant, so you don't need to know it. 
        
             
        
        
        
Answer:
dV/dt  = 9 cubic inches per second
Explanation:
Let the height of the cylinder is h 
Diameter of cylinder = height of the cylinder = h 
Radius of cylinder, r = h/2 
dh/dt = 3 inches /s 
Volume of cylinder is given by 

put r = h/2 so, 

Differentiate both sides with respect to t. 

Substitute the values, h = 2 inches, dh/dt = 3 inches / s

dV/dt  = 9 cubic inches per second
Thus, the volume of cylinder increases by the rate of 9 cubic inches per second.
 
        
             
        
        
        
The MA is 6! Hope This Helps!