Volume of a cone = (1/3) x Area of the base (B) x height(h)
V = (1/3)·420·180
   = 25200 mm³
        
             
        
        
        
2/11
there’s 2 R’s and 11 total so 
possible outcomes/ overall outcomes
        
             
        
        
        
The pattern is n-3, so we will start from the beginning, from 1.
7, 4, 1, -2, -5, -8, -11, -14, -17, -20, -23, -26, -29, -32, -35, -38, -41, -44.
-44 is the 18th term in the sequence.