Answer:
40 and 10
Step-by-step explanation:
if you add them you get 50 and if you subtract them you get 30
 
        
                    
             
        
        
        
I did 54/8 because you are multiplying D×8 and the product of 54/8= 6.75 so yeah the answer is 6.75
        
             
        
        
        
so 253 doubles is 506, 506 divided by two = 253
therefore the answer will be '' 506 divided by 2 = 253''
        
             
        
        
        
Answer:
78.53975
Find area of circle using radius, divide that by four