Answer:
2 or 3
Step-by-step explanation:
write it down dummy 
 
        
             
        
        
        
X = 3*15 = 45
Hope it helped.
        
             
        
        
        
Answer:
Proved
Step-by-step explanation:
To prove that every point in the open interval (0,1) is an interior point of S
This we can prove by contradiction method.
Let, if possible c be a point in the interval which is not an interior point.
Then c has a neighbourhood which contains atleast one point not in (0,1)
Let d be the point which is in neighbourhood of c but not in S(0,1)
Then the points between c and d would be either in (0,1) or not in (0,1)
If out of all points say d1,d2..... we find that dn is a point which is in (0,1) and dn+1 is not in (0,1) however large n is.
Then we find that dn is a boundary point of S
But since S is an open interval there is no boundary point hence we get a contradiction. Our assumption was wrong.
Every point of S=(0, 1) is an interior point of S.
 
        
             
        
        
        
1.f
2.c
3.b
4.e
5.a
6.d
in order
        
             
        
        
        
Its 15 boats bcuz...252+288=540 and 540/36= 15 boats :D