Answer: A. 55°
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer is: C
√11 ≈ 3.3661 
Which the closest to your answers is 3.3
        
             
        
        
        
The answer is B! It passes the vertical line test
        
             
        
        
        
Well the multiplication part is the same .Its in the ordering it has to be(ex: 42 times 35) but it has to be placed vertically .For the second number multiply to the right then the left .Repeat .Then you got your answer using 2 digits similar to regular multiplication partial products .Hope this helped !!