Answer:
i think its E
 im not sure 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
SEE BELOW IN BOLD.
Step-by-step explanation:
a.
h = -16t^2 + 50t 
h = 20 t
When the height is the same:
-16t^2 + 50t = 20t
-16t^2  + 30t = 0
t(-16t + 30) = 0
t = 0 or  -16t + 30 = 0, so:
t = 0 or -30/-16 = 1.875
So the answer is 1.88 seconds to the nearest hundredth.
b.
For the ball
h = -16t^2 + 50t
Finding the derivative and equating to zero:
dh/dt = -32t + 50 = 0
t = -50/-32 = 1.563
Maximum height after 1.56 seconds to nearest hundredth
c.
When the ball hits the ground h = 0 so
-16t^2 + 50t = 0
-16t(t - 50/16)= 0
T = 3.13 SECONDS TO THE NEAREST HUNDERDTH
 
        
             
        
        
        
The level has dropped 11 mms in 22 hours
that is 0.5mm per hour
So the remaining 31 mm will be gone in 31 / 0.5 = 62 hours
62 hours after 11 am Wednesday brings us to   11 am Friday + 14 hours 
=  1 am Saturday.   answer
 
        
                    
             
        
        
        
Answer:
0.2
Step-by-step explanation:
3/15=0.2