The sqrt(7) part makes it irrational, so the answer is irrational.
 
        
                    
             
        
        
        
Answer:
<h2><u>Solution</u><u> </u><u>:</u><u>-</u></h2>
We know that
V = πr²h
400 = 22/7 × r² × 8
400 × 7 = 22 × 7r²
2800 = 154r²
2800/154 = r²
18 ≈ r²
4.2 = r
 
        
                    
             
        
        
        
Step-by-step explanation:
please mark me as brainlest
 
        
             
        
        
        
9514 1404 393
Answer:
   B, C
Step-by-step explanation:
Shelby's total earnings will be the sum of the amount she has earned and the amount she can earn working h hours. That latter amount is 25h, since she makes $25 per hour. She wants that total to be at least $2000.
   75 + 25h ≥ 2000
Dividing by 25 gives ...
   3 +h ≥ 80
subtracting 3, we have ...
   h ≥ 77
These match options B and C of your list.