Step-by-step explanation:
I am not allowed to answer more than 3 questions.  So I will do the first 3.
15a. i)  (2/3) = 4/9
       ii)  (2/3) = 8/27
       iii)  (2/3) = 16/81
   b.  The product is small because you are finding the fraction of a fraction.
16.  Compared to the factors, the product is less than each fraction.  This is because, as stated above, you are trying to find a fraction (a part of the whole) of another fraction.  When you multiply a whole number by a fraction, the whole number decreases.  The same applies to a fraction.
17a.  0.4 × 0.3 = 0.12
   b.  0.4 = 4/10 = 2/5
        0.3 = 3/10
        3/10 × 2/5 = 6/50
 
        
             
        
        
        
Answer:
36 in³
Step-by-step explanation:
Volume of cylinder = pi×r²×h
Volume of cone = ⅓×pi×r²×h
For same r and h,
Volume of cone is ⅓ of the Volume of cylinder 
⅓ × 108 = 36
 
        
             
        
        
        
Answer:
W = 55T
Step-by-step explanation:
He types 110 / 2 = 55 words every minute. Thus, W = 55T
 
        
             
        
        
        
Answer:
84m2 
Step-by-step explanation: