Answer: it’s not an app but desmos graphing calculator works for me
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The answer is D. 
Step-by-step explanation:

simplify the expression by multiplying 

calculate the product

express with a positive exponent using 
 
 
 
        
                    
             
        
        
        
 Answer:
The function  is shown by the graph below ⇒ 2nd answer
  is shown by the graph below ⇒ 2nd answer
Step-by-step explanation:
<em>To find the right function chose two points from the graph and substitute the x-coordinate of each point in the function to find the y-coordinate, if they are the same with the corresponding y-coordinates of the points, then the function is shown by the graph</em>
From the figure:
The curve passes through points (-2 , 0) and (2 , 2) 
∵  
∵ x = -2
- Substitute x by -2
∴ 
∴  ⇒ it is impossible no square root for (-) number
 ⇒ it is impossible no square root for (-) number
∴  is not the function shown by the graph
 is not the function shown by the graph
∵  
∵ x = -2
- Substitute x by -2
∴ 
∴ 
∴ f(-2) = 0 ⇒ same as the y-coordinate of x = -2
∵ x = 2
- Substitute x by 2
∴ 
∴ 
∴ f(2) = 2 ⇒ same as the y-coordinate of x = 2
∴ The function  is shown by the graph below
 is shown by the graph below
 
        
             
        
        
        
Answer:
153.94
Step-by-step explanation:
AB=πr2=π·72≈153.93804
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
it's - 6  Anasta  :)