Answer: 1/4
Step-by-step explanation: 20 is a fourth of 80
Please mark brainleist if I got it right. I really need it to level up
 
        
             
        
        
        
I think you just divide the 130 ft by the 40 ft = 3.25 ??
        
             
        
        
        
Answer:
D. The work shown above is correct, and ![y^5\sqrt[4]{y^3}](https://tex.z-dn.net/?f=y%5E5%5Csqrt%5B4%5D%7By%5E3%7D) may not be simplified further.
 may not be simplified further.
Step-by-step explanation:
If you add all the exponents of y in first line then we get 
4+4+4+4+4+3=23 
Which is same as the exponent in original problem.
So first line is good.
Since it is 4th root so each  will turn into y when it moves out of the radical so final answer is correct.
 will turn into y when it moves out of the radical so final answer is correct.
Hence correct choice is "D. The work shown above is correct, and ![y^5\sqrt[4]{y^3}](https://tex.z-dn.net/?f=y%5E5%5Csqrt%5B4%5D%7By%5E3%7D) may not be simplified further." is the correct answer.
 may not be simplified further." is the correct answer.
 
        
             
        
        
        
Diameter is 9 inch so the radius is 9/2=4.5inch
Part A: 2πr=28.26inch
π=28.26/(2r)
π=28.26/(2*4.5)=3.14
Part B: πr^2=63.585inch
π=63.585inch/(4.5inch)^2
π=3.139753086 
Part C: Both of the answers are correct but Part B is more percise because it has more significant figures.