4.05 in a mixed number is 4 1/2
        
                    
             
        
        
        
Answer:
2x4y=2... hope this helps.
 
        
             
        
        
        
Step-by-step explanation:
a,b) you can place all 17 in the middle and both circle will have 17 each. then remove 2 and place one each on separate sides. you can do this 8 times so that at the you'll end up with 1 in the middle and 8 each on separate sides. 
the ways to do is then 9.
 
        
             
        
        
        
A  Andreas dad weighs 91 k.
B Andrea and her dad both weigh 91 k.
        
                    
             
        
        
        
Option A will be the correct answer