We are asked to find 7 is what percent to 30.
We will use proportions to solve our given problem.      
Let us assume that 7 is n% of 30. So we can set a proportion as:

Let us solve for n.




Therefore, 7 is  of 30.
 of 30.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
  
→ First look at the first term of each expression and see if they can be simplified, and they can

→ Now look at the a terms, since a larger one is at the top, you subtract

→ Now simplify the b and c terms

 
        
             
        
        
        
To answer items such as this, we directly substitute the a + 2 to the all the x's in the function such that,
 f(a + 2) = (3 + a + 2) / (a + 2 - 3)
Simplifying the function generated above, 
 f(a + 2) = (5 + a) / (a - 1)
        
             
        
        
        
The arc length is 0.69813170079773