Answer:
Step-by-step explanation:
 
        
             
        
        
        
Answer: the normal curve can be used as an  approximation to the binomial probability considering the following condition: when the sample is large, in this case n=112
Step-by-step explanation:
for a binomial experiment to be approximated to normal distribution, the following conditions must be present: 
i.  sample size must be large, in this case sample size is 112
ii.  the mean must be equal to np,where n is sample size and p is probability  of success
iii.  the standard deviation must be equal to npq,where q is the probability of failure
 
        
             
        
        
        
H=v/(2pir)
You just have to isolate h. To do that you are going to divide both sides by 2pir. 
        
             
        
        
        
Answer:
d = 7.2
Step-by-step explanation:
We can cross multiply the equation to get:
6 * 30 = 25 * d
(* is multiplication sign by the way)
180 = 25d
Divide both sides by 25 to get:
d = 7.2
 
        
             
        
        
        
Answer:

Step-by-step explanation:
The work is define as the integral of the force times distance. So we have:

Now, we can write the force in terms of density.

V is the volume (V=2*1*1=2 m³) 
So the work will be:

The limit of integration is between 0 and 0.5 because we want to pump half of the water out of the aquarium.


 I hope it helps you!