I believe the answer is c im am stuck on the same problem do you know the answer?<span />
        
                    
             
        
        
        
2.873 ≈2.9 (nearest tenth)
        
                    
             
        
        
        
Answer:
w=2r 
r= w/2
r- w/2 = 0 
w -2r= 0 
Step-by-step explanation:
Let w be the number of weeks and r be the number of recipes learnt . So he will learn 2 recipes each week .Equating gives 
w=2r
when w= 1 
w= 2(1) = 2
For 1st week 2 recipes are learned
when w= 2
w= 2( 2) = 4
For 2nd week 4 recipes are learned.
or 
when r= 2 
r= w/2 
r =2/2  = 1  one  recipe is learned in half of the week  
r- w/2 = 0 
or 
w -2r= 0 
 
        
             
        
        
        
Hi there!
Since we know that 36 is 1/10 of 360, all we need to do is divide the total area (85) by 10. This gives us 8.5pi ft^2.
Hope this helps!! :)