The speed of the ball is 
ds/dt = 32t
At t =1/2 s
ds/dt = 16 ft/s
The distance from the ground
50 - 16(1/2)^2 = 46 ft
The triangles formed are similar
50/46 = (30 + x)/x
x = 345 ft
50 / (50 - s) = (30 + x)/x
Taking the derivative and substituing
ds/dt = 16
and
Solve for dx/dt
        
             
        
        
        
I believe none is the answer due to the fact it isn’t symmetrical. sorry if i am wrong. let me know if i am
        
             
        
        
        
2 will be left over <span>The largest multiple of </span>6<span> which is less than or equal to </span>170<span> is </span>168
<span>and </span><span>170−168=<span>2</span></span>
        
                    
             
        
        
        
150 divided by 50 equals the amount of time it took her to drive there
3 hours
This is the answer because 150 divided by 5 equals 3 and more simply 50 + 50+ 50= 150