I wrote process on this picture I hope it’ll helpful to you
 
        
        
        
Simplifying √196 before doing the multiplication:
( √196 ÷ 7 ) × √48
= ( (√4 × √49) ÷ 7 ) × √48
= ( (2 × 7) ÷ 7 ) × √48
= 2√48
Simplifying √48:
= 2 × √16 × √3
= 2 × 4 × √3
= 8√3
which is irrational because it's a square root
        
             
        
        
        
Answer:
C
Step-by-step explanation:
according to sine rule,
sin(30)/8=sin(x)/11
solving above equation will give
x=43.3
 
        
             
        
        
        
You need to a table of the standard normal cumulative distribution 
Here is one:
https://math.ucalgary.ca/files/math/normal_cdf.pdf
the closest value I see is 0.85
        
             
        
        
        
Answer:
231
Step-by-step explanation:
first of all it must be a cuboid bcoz a cube's edge is same i.e length =breadth= height.
now volume of cuboid =lbh
11/2×21/2×4
=231
ans....