Answer:
87.8
Step-by-step explanation:
So you have to multiply 91 times 3.5 which equals 318.5
                       91 × 3.5 = 318.5
Then divide 318.5 by 100 which equals 3.185
                       318.5 ÷ 100 = 3.185
Next subtract 91 by 3.185 which equals 87.815
                       91 - 3.185 = 87.815
Last Round 87.815 to 87.8
                        87.8 should be the answer
Hope this helps
 
        
                    
             
        
        
        
So long as the perimeters are the same, rectangles and squares share the same area. For example, a square that is 2m by 2m across is 4m squared. A rectangle of 4m by 1m across is still 4m squared. 
Therefore all we want to do here is see how big we can make our “square” perimeter using the creek. We have three sides to spread 580ft across, therefore if we divide this by 3, we get 193.3ft of fencing per side. If we then square this figure, we will then get the maximum possible area, which comes to 37,377ft squared. (That’s a huge garden).
        
                    
             
        
        
        
If you graph it, it looks linear.
        
             
        
        
        
Length of AC is 5 I hope this helps I can’t think right right now so bare with me